List of Sea Animals A-Z

Updated on August 23, 2017
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A List of Sea Animals

The ocean, the original home of earth’s animal life, has creatures of every size and type. It’s an exciting place to explore. Read through this list of sea animals—arranged in alphabetical order—to start exploring what's in our seas. See photos, pictures, and facts. Start your journey now and see for yourself how awesome our sea really is!

How Many Sea Animals Can You Name Off the Top of Your Head?

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A

  • Abalone: a large edible sea snail of coastal waters
  • Albacore: a prized species of tuna
  • Anchovy: a small, oily fish of the Atlantic and Pacific, providing food for many fish, marine mammals, and birds
  • Angelfish: a bright-colored fish of coral reefs

An abalone pried from the rocks
An abalone pried from the rocks | Source

B

  • Barnacle: an arthropod of coastal waters that attaches itself to rocks and shells
  • Barracuda: a tropical and subtropical predatory fish with a feisty appearance
  • Blue Crab: a delicacy on the eastern coast of the US
  • Blue Whale: the world’s largest marine animal
  • Bull Shark: an aggressive shark that can thrive in both salt water and fresh water

Blue Whale (tail)
Blue Whale (tail) | Source

C

  • Cleaner wrasse: a coral-inhabiting fish that removes parasites from other fish
  • Clownfish: a small tropical fish of the Indian and Pacific Oceans, with orange and white stripes
  • Cod: a deep-sea fish, formerly a staple food in Europe and America, now greatly reduced in numbers in the Atlantic
  • Conch: an edible shellfish with a distinctive spiral shell
  • Coral: polyps, mostly tropical, mostly living in huge colonies along with photosynthesizing microorganisms
  • Crown of Thorns: a large sea star that feeds on corals
  • Cuttlefish: a squid-like creature belonging to the mollusk family

Triggerfish being cleaned by wrasses (small blue fish), Red Sea
Triggerfish being cleaned by wrasses (small blue fish), Red Sea | Source

D

  • Dolphin: an intelligent, vocal, social sea mammal
  • Dottyback: a brightly colored fish of coral reefs
  • Dragonet: a showy tropical fish of the Indian and Pacific Oceans, with dragon-like eyes and fins
  • Driftfish: perch-like fish of tropical and subtropical waters, often associated with jellyfish or sargasso weed
  • Dugong or Sea Cow: a herbivorous marine mammal, a threatened species of the coastal Indian Ocean
  • Dungeness Crab: a large, prized edible crab from the western coast of North America

Mandarin Dragonet
Mandarin Dragonet | Source

E

  • Eel: long-bodied fishes mostly living in shallow waters
  • Elephant Seal: a large seal, with big-nosed males, living in the waters around western North America and Antarctica
  • Emperor Shrimp: a bright-colored shrimp of the Indo-Pacific region that lives cooperatively on other sea animals
  • Estuarine Crocodile: the world’s largest living reptile, found in Southeast Asian and Australian estuaries

Did You Know? Estuarine Crocodiles Are Huge

The largest crocodile ever caught alive was a male estuarine crocodile named Lolong, measuring 20 feet and 3 inches and weighing 2370 pounds. He was caught September 2011 in the province of Agusan del Sur, Philippines, having been accused of eating humans and water buffalo. He was exhibited in an ecotourism park in Bunawan. Until he died in February 2013, he was the world's largest crocodile in captivity.

F

  • Fan Worm: a worm that lives in a tube and feeds by straining seawater with its feathery tentacles
  • Flounder: a flatfish, camouflaged to match the ocean bottom, with both its eyes located on one side
  • Flying Fish: a tropical fish with wing-like pectoral fins
  • Fugu: a puffer fish, a Japanese delicacy, whose body parts contain a nerve toxin

Fugu (smaller fish at front) with Amberjack
Fugu (smaller fish at front) with Amberjack | Source

G

  • Giant Squid: one of the largest living animals, up to 43 feet long, found in the world’s deep oceans
  • Great White Shark: a large, aggressive shark with a white belly and gray back
  • Grouper: a stubby, big-mouthed fish; many can change sex from female to male
  • Grunion: a small, slender fish that spawns on beaches at night in Southern California and Baja California

Giant Squid Eating Bait on Camera

H

  • Haddock: a gray bottom-dwelling fish endemic to the North Atlantic Ocean
  • Hake: a food fish with an elongated body and a large head
  • Halibut: world’s largest flatfish, diamond-shaped, with one dark side and one light
  • Herring: a popular food fish that travels in large schools
  • Humpback Whale: a majestic-looking black-and-white whale with long, wide pectoral fins

Two giant halibut caught near Petersburg, Alaska in the 1930s
Two giant halibut caught near Petersburg, Alaska in the 1930s | Source

I

  • Irukandji: a tiny but highly venomous jellyfish mostly found off the Australian coast
  • Isopods: crustaceans, seagoing relatives of sowbugs and pillbugs

Deep-sea giant isopod
Deep-sea giant isopod | Source

J

  • Jellyfish: among the world’s most ancient multicelled animals, with a soft, jelly-like “bell” and tentacles
  • John Dory: a coastal fish with an eyelike black mark on each side, and long, spiny dorsal fins

Cauliflower jellyfish (Cephea cephea), Red Sea
Cauliflower jellyfish (Cephea cephea), Red Sea | Source

K

  • Killer Whale or Orca: a toothed, predatory black-and-white whale
  • King Mackerel or Kingfish: a medium-sized food fish of the Atlantic coast of the Americas
  • Krill: tiny shrimp-like crustaceans, very numerous in all oceans, important food for other creatures

Northern Krill
Northern Krill | Source

L

  • Lamprey: a jawless fish with an eel-like body, circular sucking mouth, and triangular teeth; many are bloodsuckers
  • Leafy Sea Dragon: a fish with seaweed-like appendages for camouflage
  • Ling: a long slender fish of the North Atlantic
  • Lionfish: a venomous fish with red and white stripes and spiny dorsal fins
  • Lobster: a large crustacean with a muscular tail and two large claws

Leafy Sea Dragon
Leafy Sea Dragon | Source

M

  • Mackerel: a food fish with a striped back and deeply-pronged tail
  • Mahi-mahi or Dorado: a medium-sized fish with a long back fin running from head to tail
  • Manatee or Sea Cow: a large herbivorous sea mammal, related to the dugong, with rounded flippers
  • Manta Ray: a very large ray (up to 20 feet), a filter-feeder of open oceans
  • Megalodon: an extinct giant shark, one of the largest predators ever, up to 65 feet long
  • Mulloway: a predatory fish mostly found on Australian rocky shorelines
  • Mussel: a two-shelled mollusk; most attach themselves to shoreline rocks with tough threads

Manatees
Manatees | Source

N

  • Narwhal: an Arctic whale whose males have a long tusk
  • Nautilus: a primitive mollusk of the tropical Pacific, with a spiral shell and tentacles
  • Needle Fish: a slender-bodied, long-jawed fish of shallow water
  • Nemertea or Ribbon Worm: a primitive invertebrate with a stinging organ in its front end
  • Nudibranch: a colorful marine slug

Nudibranch
Nudibranch | Source

O

  • Oarfish: a long, slender, seldom-seen fish; 20-foot specimens occasionally wash up on beaches
  • Octopus: a color-changing mollusk with eight suction-cup-bearing tentacles; the most intelligent invertebrate
  • Olive Sea Snake: a highly venonomous swimming snake of Indo-Pacific coral reefs
  • Ostracod or Seed Shrimp: a tiny, two-shelled crustacean, abounding in oceans as well as in humid environments on land
  • Oyster: a two-shelled mollusk eaten as a delicacy around the world

Olive sea snake
Olive sea snake | Source

P

  • Pilchard or Sardine: a small, oily fish that typically swims in large schools
  • Plankton: tiny marine organisms of all kinds—animals, plants, bacteria, algae, protists—that play a major role in the world’s food chains and chemical cycles
  • Porcupine Fish: a spiny tropical marine fish that can inflate itself
  • Porpoise: a small toothed marine mammal, related to dolphins but with different-shaped nose and teeth
  • Prawn: a name for the larger kinds of shrimp
  • Pufferfish or Puffers: poisonous fish (including fugu, above) that inflate into balloon-like shapes when threatened

Plankton (dinoflagellates, Neoceratium horridum) from the North Sea, magnified 160 times
Plankton (dinoflagellates, Neoceratium horridum) from the North Sea, magnified 160 times | Source

Q

  • Quahog: a round, hard-shelled clam of the US Atlantic coast
  • Queen Conch: a large edible sea snail of the tropical and subtropical western Atlantic
  • Queensland Blenny: a small fish with comb-like teeth native to coral reefs of the western Pacific
  • Quillfish: a long, thin, seldom-seen fish of the northeastern Pacific

Quahogs from Narragansett Bay, Eastern US
Quahogs from Narragansett Bay, Eastern US | Source

R

  • Red Waratah Anemone: a red anenome (a polyp with stinging tentacles) of the shores of Australia and New Zealand
  • Requiem Shark: a group of aggressive shark species of warm oceans or fresh water
  • Ringed Seal: a small, earless seal native to the Arctic, that makes breathing holes in sea ice
  • Ross Seal: a large seal endemic to the Antarctic ice

Red waratah anemones in New South Wales, Australia.  The anemone on the right has closed itself up.
Red waratah anemones in New South Wales, Australia. The anemone on the right has closed itself up. | Source

S

  • Sea Cucumber: a soft, sausage-shaped echinoderm with leathery skin and a tentacled mouth
  • Sea Horse: a small, upright-swimming fish (it really is a fish) with a horse-like head
  • Sea Lion: a large, eared seal with long limbs acting as flippers
  • Sea Otter: a furry marine mammal of the north Pacific that eats sea urchins, mollusks, crustaceans, and fish
  • Sea Turtle: seven species of turtles that have flippers for limbs; they may live for hundreds of years
  • Sea Urchin: an echinoderm, often with a spherical body covered with long spines
  • Sponge: a marine invertebrate with a porous body without distinct tissues or organs
  • Starfish or Sea Star: predatory star-shaped echinoderms that crawl on tiny tube feet
  • Swordfish: a large, migratory fish with a sword-like snout

Purple tube sponges
Purple tube sponges | Source

Did You Know? Some Sharks Can Live in Fresh Water

Most sharks cannot survive in fresh water. But the Bull Shark ventures up estuaries and rivers, including the Mississippi River of North America, and seldom-seen River Shark species live in southern Asia and Australia.

T

  • Tiger Shark: a large shark (up to 16 feet) of tropical and subtropical oceans, with dark stripes
  • Tilefish: a small, spiny fish of tropical and temperate oceans, preferring coral reefs and sandy areas
  • Trumpetfish: a long, thin fish of the tropical western Atlantic, that often dangles or swims vertically to blend in with its surroundings
  • Tube Worms: a variety of different marine invertebrates that secrete hard tubes to protect themselves
  • Tun Shell: a tropical sea snail with a rounded shell said to resemble a “tun” or wine cask

Sand tilefish
Sand tilefish | Source

U

  • Umbrella Shell: a sea slug (gastropod) with a spotted skirt-shaped body extending from its shell
  • Unicornfish: an Indo-Pacific fish with a horn-like protrusion on its forehead

Spotted unicornfish, Red Sea
Spotted unicornfish, Red Sea | Source

V

  • Vampire Squid: a primitive cephalopod living at great depths, covered with light-emitting spots, with dark webbing connecting its tentacles
  • Velvet Crab: a small swimming crab of the North Atlantic and western Mediterranean
  • Violet Sea Snail: a purple sea snail of tropical and subtropical oceans that floats on a raft of mucus bubbles
  • Viper Fish: a deep-sea fish with long, sharp teeth, big jaws, and an illuminated bell-shaped lure

Velvet Crab
Velvet Crab | Source

W

  • Walrus: a large Arctic marine mammal with long tusks and whiskers
  • Whapuku or Wreckfish: a large fish, prized for food, from the seas off New Zealand and Australia
  • Whiting: a food fish of the cod family, of the shallow coastal waters off Europe

Young male walrus
Young male walrus | Source

X

  • Xiphias: Latin for "swordfish," the genus name for the swordfish group
  • Xiphosura: The 400-million-year-old class of arthropods that includes horseshoe crabs, which are related to spiders and ticks

Underside of horseshoe crab, Mexico
Underside of horseshoe crab, Mexico | Source

Y

  • Yellowfin Tuna: a large, fast-moving fish of the open ocean, with yellow dorsal fins
  • Yellowtail Amberjack: a large food fish of the Indo-Pacific region
  • Yellow Tang: a small bright yellow fish of Indo-Pacific reefs, popular in saltwater aquariums

Yellow tang
Yellow tang | Source

Z

  • Zooplankton: the huge variety of tiny animals, eggs, and larvae that drift in oceans
  • Zebra Turkeyfish: a spotted-and-striped spiny fish of shallow tropical Indo-Pacific waters

Zooplankton: Tiny calcium carbonate shells of foraminifera (Baculogypsina sphaerulata)
Zooplankton: Tiny calcium carbonate shells of foraminifera (Baculogypsina sphaerulata) | Source

Animals of the North Sea

Questions & Answers

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      • profile image

        Anima 2 days ago

        this really helped but you missed a lot of things!!

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        amina 11 days ago

        Is this the animals from the Atlantic Ocean because I am in 5th GRADE and I am doing an ocean project

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        User 2 weeks ago

        Useful

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        nothing 4 weeks ago

        thanks helped a lot

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        random 4 weeks ago

        oh wow interesting

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        shortcake 7 weeks ago

        this is ok but i learn more info from animal planet

      • profile image

        kdog 7 weeks ago

        this made my project so much easier!!!!!!!!!!!!!

      • profile image

        dodi 2 months ago

        my name is dodi and i live in australia. you forgot so many things its incredible

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        Rastko 2 months ago

        You missed Squid!!!!

      • profile image

        2 months ago

        it really help on my ABC book

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        science help 3 months ago

        this really helped me on my biomes project in school

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        nICE 3 months ago

        iT REALLY HELPED ME OUT!!!

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        Freestyle 3 months ago

        you have helped me so much but I need to know more about the sword shark

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        No 3 months ago

        Thanks

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        ANONYMOUS 3 months ago

        Thank you so much

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        RYnn 3 months ago

        This helped me, Thank you so much

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        dan 3 months ago

        your the best

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        Zoey 3 months ago

        You halp me with my work

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        dwils 3 months ago

        i LOVE orcas/killerwales

      • profile image

        lyan 4 months ago

        cool

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        ollie 4 months ago

        whats a zebra turkey fish

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        dianey 5 months ago

        i love killer whale

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        irene 5 months ago

        i love horses

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        Cool dude 5 months ago

        I love animals

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        Jhon 5 months ago

        very helpful....

      • profile image

        Will 5 months ago

        i like all sea

        Animals

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        kayla 5 months ago

        blue whale

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        jojo 5 months ago

        blob fish

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        Chickennugget 5 months ago

        This was GREAT! I'm doing a project for school about sea creatures and I found my favorite: MANATEE!

      • profile image

        Helllo Peeps!!! 6 months ago

        That is a amazing site!!!

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        Gianna 6 months ago

        cool

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        William Orger 7 months ago

        You forgot the bloop

      • profile image

        Poppickle3 7 months ago

        really coolioo

      • profile image

        Wajeeha 7 months ago

        Wow!This is cool and amazing.

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        manohar maury 7 months ago

        too good i am happy to study

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        Katie McNally 7 months ago

        Wow! Found my fav sea aanimal! Walrus!

      • profile image

        sala 8 months ago

        this is so cool and amazing

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         9 months ago

        AMAZING You could put this on facebook

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        Anakin Skywalker 9 months ago

        WOW! I used, like, 1700 of those in my book.

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        Mia 9 months ago

        great list really helped with my sisters homework...

        Thankyou very much!

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        chiru 10 months ago

        Super and sexy work!

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        junior 10 months ago

        am so inpressed with u guy

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        You forgot blobfish 10 months ago

        Why

        Did

        You

        Forget

        Blobfish

        :(

      • profile image

        CLASS 10 months ago

        thanks for everything you put here because my class really liked it! and i'm not doing correct punctuation because im in a rush but really thx!@

      • profile image

        misha 10 months ago

        cool!

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        Anuradha Dubey 10 months ago

        Excellent work

      • profile image

        gigi 11 months ago

        Whasn't there a animal that was "A living fossil" ????

      • profile image

        Rhio 11 months ago

        Thx a lot I finished home work now

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        Bobby Joe 11 months ago

        This really helped me with a school project, it came in handy!

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        someone who commented 11 months ago

        it looks so cool. great job!!!!!

      • profile image

        Silly lily 11 months ago

        U did awesome! This is amazing, but u missed about fifteen. Try to edit it and add more animals. Thx! This really helped me with a school project. Thank u!

      • profile image

        Brantlee 11 months ago

        I like this it give you stuff for school and i am in third grade

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        anwar hsan ch 11 months ago

        It's a very knowledgeable page I impressed ,03006917543

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        austin 11 months ago

        hi man

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        E1234 11 months ago

        My friend and I are finding things to research about Marine Biology, and this is extremely helpful and now I can tell her about lots of life in the ocean because of this website!! Thank you!! :)

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        lilly 11 months ago

        its so cool the great white shark

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        madeleineb 11 months ago

        well done

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        Scarborough 11 months ago

        Great

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        82 11 months ago

        Thank you

      • profile image

        anon 12 months ago

        You really helped me finish my project. Thank you very much

      • profile image

        Natalie Naber 12 months ago

        So many creatures to learn about

      • profile image

        bob 12 months ago

        lol man

      • profile image

        macen 12 months ago

        A lot of animals

      • profile image

        svl125 12 months ago

        nice work

      • profile image

        shunem 12 months ago

        books you should make a book out of this

      • profile image

        shunem 13 months ago

        you are too cool

      • profile image

        shunem 13 months ago

        also sorry about crazy lady but your great

      • profile image

        Heaven 13 months ago

        very good even though you missed a couple you still did good

      • profile image

        manpreet kailey 13 months ago

        were did you find out all of this.and i used this list in abc order for my progect of habbitats.hope my teacher will like my progect and the others

      • profile image

        Aidan S 13 months ago

        i also have 30 animal project due today and your website made it happen

        P.S I go to school with Ana

      • profile image

        Ana 13 months ago

        I have a project due in my school and I have to find 30+ sea creatures this helped me soo much thanks for making this website.

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        kimber 13 months ago

        I like your website:)

      • profile image

        shunem 13 months ago

        you are the best

      • profile image

        shunem 13 months ago

        this is amazing great job cheers

      • profile image

        CRAZY WOMAN 13 months ago

        bye the way i was just kidding dude

      • profile image

        shunem 13 months ago

        good job

      • profile image

        andrew 13 months ago

        wheres the blue tang

      • profile image

        VERY GOOOOOOOOOOOOOOD 13 months ago

        VERY GOOOOOOOOOD

      • profile image

        why 13 months ago

        Missing so many animals I don't suggest this site.

      • profile image

        hesggvs 13 months ago

        so good

      • profile image

        kirsten 14 months ago

        helped me alot

      • profile image

        i dont need a name.... 14 months ago

        cool........thats all i can say.......cool....

      • profile image

        ur mom 14 months ago

        thx this helps on my project

      • profile image

        Bonnie♥‿♥ 14 months ago

        This just helped me on my art work, now all I have to do is draw them and try my best.(^v^)

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        camp keep 14 months ago

        we are making a book about this and this is the best site i saw today for camp keep students:):):):):):)

      • profile image

        anonmous 15 months ago

        AWESOME!!!!!!!!!!!!!!!!!!!!!!!!!!!!! I love fish and this is a graet source for my project!

      • profile image

        angake 15 months ago

        this is really nice

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        ASminecraft 17 months ago

        This is a good scoure

      • profile image

        gavin 17 months ago

        thanks please please keep this site open but for different topics if they are not out there........

      • profile image

        A bee 17 months ago

        that helped a lot :):):):):)

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        Sarah 17 months ago

        I needed this for homework thank you for your help you are the best

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        Lol 17 months ago

        This was amazing an I would definetely use it again

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        Idubbbz 18 months ago

        leafy has no chin

      • profile image

        Frankie 18 months ago

        Great work I love owl cation it will help me a lot on my school work

      • profile image

        Freya 18 months ago

        Great this helped me a lot with my homework

      • profile image

        maybee vantor 20 months ago

        I got sum help two bee'cause i couldn't decide if i liked a bee or crab more so out of it all i like the xiphosura

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        Ari Welmare 20 months ago

        I honestly got some help from this site because I had to list 100 animals and I had to separate them into 2 groups,I got to choose how to separate them,so I chose Non-Marine and Marine animals.By the way this is for my science class.

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        one word beautiful 20 months ago

        I love sea animals and when i grow up i will learn more about them

      • profile image

        Walks tinged 20 months ago

        Helped a lot

      • profile image

        prashanth 21 months ago

        awesome I got know of so many more sea creatures that have been listed here.

      working