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List of Sea Animals A-Z

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I am a mother to two jovial boys who likes to write about things that interest me and my children—like painting, crafts, and nature.

Sea Creatures List

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!


  • 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


  • 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


  • 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


  • 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


  • 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.


  • 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


  • 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


  • 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


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


  • 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


  • 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


  • 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


  • 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


  • 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
  • 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


  • 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


  • 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


  • 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.


  • 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

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.


  • 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


  • 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


  • 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


  • 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


  • 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


  • 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


  • 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)

New Guestbook Comments

Jesse on August 29, 2020:

It was boring!!!!!!!!!!!!!!!!!!!!!! Like seriously dry!!!!!!!!!!!!

Sebastian on August 29, 2020:

It really helped me alot in doing my lockdown online lesson assigment but i think these are not all tne sea animals in this world

queen on August 29, 2020:


Pradip on August 14, 2020:


Layla girl on July 31, 2020:

You forgot the blue ringed octopus

Someone on July 21, 2020:

you forgot sea urchin...just saying. I love this site though!

Someone on July 21, 2020:

I want to be a marine bioligest when i grow up! This helped me so much with my school project! Thanks!

Yeet on July 02, 2020:


ISAAC on June 26, 2020:


Livi on June 21, 2020:

Hey this is really helpful, thanks!!!! I loved the look of the zookplankton- as well as its odd name!!! Anyways, thanks a lot.

unicorn girl on June 12, 2020:

really helpful im using it again

unicorn girl on June 11, 2020:

this is very helpful for my work to

noteryn20 add me on roblox :D on June 10, 2020:

thxs this helped me do my work anyone can add me on roblox

Unknown on June 09, 2020:

You forgot the stingray

YEETAMOUS on June 08, 2020:

today's world ocean day.

Lol on May 20, 2020:

You forgot to add the zombie star fish.

Anna on May 12, 2020:


Hacker on May 10, 2020:

i say i love Fugu-Sashimi the japanese blowfish but it is a HUGE risk to eat so hope you get lucky if you want to try.

Thanks. on May 04, 2020:

Thanks for putting the time and effort of finding so many fishes in the ocean. Good job!

Teni on May 01, 2020:


Lily on April 24, 2020:

Wow very helping

zach on April 20, 2020:

you didn't include the x-ray fish

ellie-may on April 19, 2020:

I love this it helped me with my school work

ELSIE on April 07, 2020:

this will be useful for instructional materials

Lion King on April 02, 2020:

Very useful and helped me study

TechnologicWave on March 28, 2020:

Hey, just realized that this was supposed to be more rare sea creatures, not the more common ones.

Kingsley on March 28, 2020:

It is cool I love to see the animals .

ken is noob on March 16, 2020:

I cannot see this web before but I already see it when I was learning :)

Pokémon on February 20, 2020:

I am soar btw

This is extremely helpful but there should be more pictures of the animals

Soar on February 20, 2020:

This was pretty helpful

Steffy on February 19, 2020:

Amazing work. Thank you so much :)

YOUR MOM on February 19, 2020:

where are the sharks?

Boii on February 17, 2020:

Haiii dude

alia on February 11, 2020:

This was so helpful (:

on February 10, 2020:

Imagine not folding the dishes

Folake Olumide on January 30, 2020:

I love this so much

Jonathan on January 21, 2020:

i had a project on school helped lots

User of google on December 20, 2019:

Very useful I made a word search very cool

Jennifer on December 07, 2019:

Thank u for this

meep on December 02, 2019:

good job. this is helpful

Me on November 18, 2019:

On what basis are you able to claim that Xiphosura is 400 million years old? The 10% of dating methods that evolutionists use to date the earth have been proven not to work, and the other 90% of ways to date the earth, show the earth to be young. Besides, how could a living cell form from nothing, it breaks the scientific law of biogenesis, the law that states “living things can only come from living things.” In the end, which has authority? The THEORY of evolution, or the LAW of Biogenesis.

Nessa on November 13, 2019:

I’m 8 and I’m going to be a marine biologist when I’m older

IKYAATOR JUSTIN on November 12, 2019:

So nice thanks

A person on October 30, 2019:

Why are there no V and W entries?

big dad on October 28, 2019:

ride my speedracer

Rub09 on October 22, 2019:


pop imposter on September 23, 2019:

I will destroy the pop community. yeet

c on September 22, 2019:

good job

pop on September 10, 2019:

(I am the real one) isn't there a pop w a r for pops and pop h8ers?

a guy on September 10, 2019:

great, but needs more 'i' entries

pop on September 05, 2019:

the guy talking about talking about the websit is an imposter.

pop on September 05, 2019:

i am the real pop guys. But I don't mind other pop fol low er s :D

hee on September 05, 2019:


Pop on September 04, 2019:

lets actually talk about the website. all in favour?

pop h8er on September 04, 2019:

All pops are bad.

hoof hearted. on September 03, 2019:

I love horses. this website too!!!!! Congratulations on your baby!!!

hi on September 02, 2019:

amazing job

pop on September 02, 2019:

I have searched 10 a-z sea creatures websites, but this is my favourite and most useful...

a guy on September 02, 2019:

Thx this was helpful

pop on September 02, 2019:

this is pretty useful....

saydee on August 31, 2019:


Hi on August 21, 2019:

I’m doing an aquatic project. Thanks!

Majok kong on August 14, 2019:

great thanks for your work

Yo on July 28, 2019:

Thank you for all of it

Johan on July 05, 2019:

This isnt all is it? Theres more than that

G on June 25, 2019:

Thank you so much.

Stella on June 24, 2019:

I love my dog and I love my auntie Lina and uncle Bob

gabe itch on June 17, 2019:

thanks g

pp on June 10, 2019:

how rude

Ruby on May 29, 2019:

Thank you author you did a great job

Ruby on May 29, 2019:

Your right they didn't add the squid

Nobody on May 22, 2019:


Reesegamer15 on May 13, 2019:

you need yeti crab there so cool look in up please you really need to add them in please. Thanks

Lexi on May 13, 2019:

thx it helped a lot :)

Meghan on May 12, 2019:

Very Use Full! I'm doing a project for school and I needed to find ABC ocean animals and this was perfect.

awesome on May 03, 2019:

thank you for helping me get my ocean book

Deepak Singh on May 02, 2019:

nice, beautiful,& danger creatures

Alizabeth on April 16, 2019:

Im researching Porcupine Fish!

Blob fish on April 13, 2019:

We need blobfish now! And more videos

Lol Blowfish Person on April 10, 2019:

your funny blowfish person

awesome on April 09, 2019:

awesome stuff usefull

octopus on April 08, 2019:

very usefull and add octopus

destiny on April 04, 2019:

cool web sit

noice on April 03, 2019:

nice website

blobfish on April 03, 2019:

may you please add blobfish

you forgot blobfish on April 03, 2019:

you forgot blobfish how dare you

no name on March 28, 2019:

this is a lovely website and well did

Dad on March 23, 2019:

I like Sea Animals.

Im on March 22, 2019:

Noice love the website

a on March 22, 2019:

hi world

vansh singh badghare on March 22, 2019:

soooo nice sea animals for me to see

willa on March 20, 2019:

Very usefull

Nicole on March 14, 2019:

Very usefull

random person on March 13, 2019:

very useful

Ava on March 02, 2019:

The ocean is very important to a lot of people whoever helps save the ocean is very special and by that I mean really special

narattive writing on February 26, 2019:

It helped a lot with my tall tale. Worth a million of those worthless websites, yours is by far the best. Cheers! Bravo!

BOB on February 19, 2019:


Ava on February 14, 2019:

This inspires me to like the ocean so much I want to be a marine biologist when I grow up

Potato on January 24, 2019:

you forgot the praying mantis

Sheldon on January 17, 2019:

where are the stingrays