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SeaRealm marine encyclopedia

Meet the real animals behind every SeaPal.

Dive past the cards and into the ocean. Discover surprising superpowers, favorite foods, wild habitats, and facts worth sharing at the dinner table.

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120
Creatures
3
Ocean zones
480
Fun facts
Bull Shark SeaRealm cardBlue Whale SeaRealm cardVampire Squid SeaRealm card

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Showing 120 creatures

African Pompano SeaRealm card
OceanicFish

African Pompano

Alectis ciliaris

Youngsters trail silver streamers like underwater kites.

Open field guide
Anchovy Ball SeaRealm card
OceanicFish

Anchovy Ball

Engraulidae

Tiny teammates with a giant place in the food web.

Open field guide
Anemone SeaRealm card
ReefInvertebrate

Anemone

Actiniaria

A stinging sea animal disguised as a flower.

Open field guide
Anglerfish SeaRealm card
DeepFish

Anglerfish

Melanocetus johnsonii

A glowing fishing rod hangs over a hungry mouth.

Open field guide
Arrow Crab SeaRealm card
ReefInvertebrate

Arrow Crab

Stenorhynchus seticornis

A tiny reef spider with an arrow-shaped nose.

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Barracuda SeaRealm card
OceanicFish

Barracuda

Sphyraena barracuda

A silver ambush rocket with a mouthful of daggers.

Open field guide
Barrel Eye Fish SeaRealm card
DeepFish

Barrel Eye Fish

Macropinna microstoma

A clear head hides swiveling green eyes.

Open field guide
Basking Shark SeaRealm card
OceanicFilter Feeder

Basking Shark

Cetorhinus maximus

A gentle giant swims with a mouth like a tunnel.

Open field guide
Black Marlin SeaRealm card
OceanicApex

Black Marlin

Istiompax indica

A heavyweight billfish with fins that never fold flat.

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Black Swallower SeaRealm card
DeepFish

Black Swallower

Chiasmodon niger

A stretchy belly makes every meal supersized.

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Blue Crab SeaRealm card
ReefInvertebrate

Blue Crab

Callinectes sapidus

A sideways swimmer with blue claws and paddle feet.

Open field guide
Blue Sea Dragon SeaRealm card
OceanicInvertebrate

Blue Sea Dragon

Glaucus atlanticus

A tiny upside-down dragon steals stings from its lunch.

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Blue Shark SeaRealm card
OceanicPredator

Blue Shark

Prionace glauca

Long-winged and bright blue, this shark never stops roaming.

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Blue Tang SeaRealm card
ReefFish

Blue Tang

Acanthurus coeruleus

A blue reef grazer carrying a hidden tail scalpel.

Open field guide
Blue Whale SeaRealm card
OceanicFilter Feeder

Blue Whale

Balaenoptera musculus

Earth's largest animal lives on bite-sized krill.

Open field guide
Bluefin Tuna SeaRealm card
OceanicApex

Bluefin Tuna

Thunnus thynnus

A warm-powered athlete built to cross an ocean.

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Bluefish SeaRealm card
OceanicFish

Bluefish

Pomatomus saltatrix

A schooling hunter with serious teeth and endless energy.

Open field guide
Bluestriped Grunt SeaRealm card
ReefFish

Bluestriped Grunt

Haemulon sciurus

A striped schooler that actually grunts underwater.

Open field guide
Bonito Tuna SeaRealm card
OceanicFish

Bonito Tuna

Sarda sarda

A striped speedster from the tuna-and-mackerel family.

Open field guide
Bottlenose Dolphin SeaRealm card
ReefApex

Bottlenose Dolphin

Tursiops truncatus

A social echo-hunter with a signature whistle.

Open field guide
Boxfish SeaRealm card
ReefFish

Boxfish

Ostraciidae

A hovering fish sealed inside natural box-shaped armor.

Open field guide
Bristlemouth SeaRealm card
DeepFish

Bristlemouth

Cyclothone spp.

Tiny lights, tiny teeth, enormous numbers.

Open field guide
Brittlestar SeaRealm card
DeepInvertebrate

Brittlestar

Ophiuroidea

Five wriggly arms row across the seafloor.

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Bull Shark SeaRealm card
ReefApex

Bull Shark

Carcharhinus leucas

A stocky sea shark equally comfortable upriver.

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Chimera SeaRealm card
DeepPredator

Chimera

Chimaeriformes

A ghostly shark cousin with crushing tooth plates.

Open field guide
Cleaner Shrimp SeaRealm card
ReefInvertebrate

Cleaner Shrimp

Ancylomenes pedersoni

A see-through reef hygienist waving extra-long antennae.

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Cleaner Wrasse SeaRealm card
ReefFish

Cleaner Wrasse

Labroides dimidiatus

The reef's tiny dentist, barber, and parasite picker.

Open field guide
Clownfish SeaRealm card
ReefFish

Clownfish

Amphiprioninae

A tiny reef neighbor protected by stinging tentacles.

Open field guide
Coelacanth SeaRealm card
DeepFish

Coelacanth

Latimeria chalumnae

An ancient fish rediscovered in modern seas.

Open field guide
Colossal Squid SeaRealm card
DeepApex

Colossal Squid

Mesonychoteuthis hamiltoni

The heavyweight squid carries swiveling hooks.

Open field guide
Cookie Cutter SeaRealm card
DeepPredator

Cookie Cutter

Isistius brasiliensis

A tiny shark takes perfectly round bites.

Open field guide
Crevalle Jack SeaRealm card
OceanicFish

Crevalle Jack

Caranx hippos

A hard-pulling jack that thrives from rivers to reefs.

Open field guide
Crown of Thorns SeaRealm card
ReefInvertebrate

Crown of Thorns

Acanthaster cf. solaris

A many-armed coral eater covered in venomous thorns.

Open field guide
Deep Cucumber SeaRealm card
DeepInvertebrate

Deep Cucumber

Holothuroidea

A squishy recycler vacuums the ocean floor.

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Deep Sea Jelly SeaRealm card
DeepInvertebrate

Deep Sea Jelly

Atolla wyvillei

A blue pinwheel alarm summons bigger trouble.

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Deep Sea Skate SeaRealm card
DeepPredator

Deep Sea Skate

Bathyraja abyssicola

A soft-winged hunter glides over the abyss.

Open field guide
Dumbo Octopus SeaRealm card
DeepInvertebrate

Dumbo Octopus

Grimpoteuthis spp.

Flappy ear-fins make deep-sea flight look easy.

Open field guide
Emerald Crab SeaRealm card
ReefInvertebrate

Emerald Crab

Mithraculus sculptus

A tiny green reef custodian with spoon-shaped claws.

Open field guide
Fairy Parrotfish SeaRealm card
ReefFish

Fairy Parrotfish

Scaridae

A rainbow reef gardener with a rock-crunching beak.

Open field guide
Fangtooth Fish SeaRealm card
DeepFish

Fangtooth Fish

Anoplogaster cornuta

The ocean's biggest grin fits in your hand.

Open field guide
Flying Fish SeaRealm card
OceanicFish

Flying Fish

Exocoetidae

A fin-winged escape artist that glides above the waves.

Open field guide
French Angelfish SeaRealm card
ReefFish

French Angelfish

Pomacanthus paru

A golden-edged sponge snacker that often swims in pairs.

Open field guide
Frigate Tuna SeaRealm card
OceanicFish

Frigate Tuna

Auxis thazard

A small tuna built for warm-water sprints.

Open field guide
Frilled Shark SeaRealm card
DeepPredator

Frilled Shark

Chlamydoselachus anguineus

Frilly gills frame a snake-shaped shark.

Open field guide
Frogfish SeaRealm card
ReefFish

Frogfish

Antennariidae

A camouflaged fisher with its own wiggly lure.

Open field guide
Galapagos Shark SeaRealm card
OceanicPredator

Galapagos Shark

Carcharhinus galapagensis

An island-patrolling shark with a curious streak.

Open field guide
Giant Clam SeaRealm card
ReefInvertebrate

Giant Clam

Tridacna gigas

The world's biggest bivalve, powered partly by sunshine.

Open field guide
Giant Isopod SeaRealm card
DeepInvertebrate

Giant Isopod

Bathynomus giganteus

A football-sized pillbug patrols the ocean floor.

Open field guide
Giant Phantom Jelly SeaRealm card
DeepApex

Giant Phantom Jelly

Stygiomedusa gigantea

Four ghostly ribbons trail through the abyss.

Open field guide
Giant Red Shrimp SeaRealm card
DeepInvertebrate

Giant Red Shrimp

Neognathophausia ingens

A crimson crustacean launches a glowing smoke screen.

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Giant Squid SeaRealm card
DeepApex

Giant Squid

Architeuthis dux

Bus-sized tentacles reach through midnight water.

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Giant Triton SeaRealm card
ReefInvertebrate

Giant Triton

Charonia tritonis

A giant hunting snail that tackles thorny sea stars.

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Giant Tube Worm SeaRealm card
DeepInvertebrate

Giant Tube Worm

Riftia pachyptila

Friendly bacteria power a mouthless vent giant.

Open field guide
Goblin Shark SeaRealm card
DeepPredator

Goblin Shark

Mitsukurina owstoni

Its jaws launch forward like a spring trap.

Open field guide
Goliath Grouper SeaRealm card
ReefPredator

Goliath Grouper

Epinephelus itajara

A reef giant with a vacuum-powered gulp.

Open field guide
Great Barracuda SeaRealm card
ReefPredator

Great Barracuda

Sphyraena barracuda

A silver torpedo built for lightning-fast ambushes.

Open field guide
Great White SeaRealm card
ReefApex

Great White

Carcharodon carcharias

A warm-muscled ocean hunter with rows of replacement teeth.

Open field guide
Green Moray Eel SeaRealm card
ReefPredator

Green Moray Eel

Gymnothorax funebris

A crevice hunter with a second set of jaws.

Open field guide
Green Sea Turtle SeaRealm card
ReefPredator

Green Sea Turtle

Chelonia mydas

A long-distance reef traveler powered by seagrass.

Open field guide
Greenland Shark SeaRealm card
DeepApex

Greenland Shark

Somniosus microcephalus

An icy giant can outlive generations of humans.

Open field guide
Gulper Eel SeaRealm card
DeepPredator

Gulper Eel

Eurypharynx pelecanoides

A pelican-sized mouth unfolds from a ribbon body.

Open field guide
Halfbeak SeaRealm card
OceanicFish

Halfbeak

Hemiramphidae

A surface skimmer with only half a long beak.

Open field guide
Hammerhead SeaRealm card
ReefApex

Hammerhead

Sphyrnidae

A living metal detector with eyes spread wide.

Open field guide
Herring Ball SeaRealm card
OceanicFish

Herring Ball

Clupea harengus

Millions of silver swimmers keep northern seas humming.

Open field guide
Humpback Whale SeaRealm card
OceanicFilter Feeder

Humpback Whale

Megaptera novaeangliae

A singing traveler with wings and bubble-made fishing nets.

Open field guide
Killer Whale SeaRealm card
OceanicApex

Killer Whale

Orcinus orca

Ocean families turn teamwork into top-predator power.

Open field guide
King Mackerel SeaRealm card
OceanicFish

King Mackerel

Scomberomorus cavalla

A sleek silver king that chases schools at speed.

Open field guide
Krill Bloom SeaRealm card
OceanicFish

Krill Bloom

Euphausiacea

Tiny crustaceans that power some of Earth's biggest animals.

Open field guide
Leather Starfish SeaRealm card
ReefInvertebrate

Leather Starfish

Dermasterias imbricata

A soft sea star that smells surprisingly garlicky.

Open field guide
Lionfish SeaRealm card
ReefFish

Lionfish

Pterois volitans

A striped ambush hunter armed with venomous spines.

Open field guide
Loggerhead SeaRealm card
OceanicPredator

Loggerhead

Caretta caretta

A powerful shell-crusher that crosses whole oceans.

Open field guide
Lookdown SeaRealm card
OceanicFish

Lookdown

Selene vomer

Turn sideways and this silver fish nearly disappears.

Open field guide
Mahi-Mahi SeaRealm card
OceanicFish

Mahi-Mahi

Coryphaena hippurus

A rainbow-fast fish that grows almost while you watch.

Open field guide
Man O' War SeaRealm card
OceanicInvertebrate

Man O' War

Physalia physalis

A floating colony sails with a curtain of stingers.

Open field guide
Manta Ray SeaRealm card
ReefFilter Feeder

Manta Ray

Mobula alfredi

A flying carpet that filters tiny ocean snacks.

Open field guide
Mantis Shrimp SeaRealm card
ReefInvertebrate

Mantis Shrimp

Stomatopoda

A rainbow-eyed crustacean with spring-loaded hunting arms.

Open field guide
Market Squid SeaRealm card
OceanicInvertebrate

Market Squid

Doryteuthis opalescens

An iridescent jet swimmer with a one-year adventure.

Open field guide
Megamouth Shark SeaRealm card
DeepFilter Feeder

Megamouth Shark

Megachasma pelagios

A rare giant mouth follows krill through dim water.

Open field guide
Needlefish SeaRealm card
OceanicFish

Needlefish

Belonidae

A surface hunter armed with a beakful of needles.

Open field guide
Nudibranch SeaRealm card
ReefInvertebrate

Nudibranch

Nudibranchia

A shell-free sea slug dressed in impossible colors.

Open field guide
Ocean Sunfish SeaRealm card
OceanicFilter Feeder

Ocean Sunfish

Mola mola

A giant swimming pancake with no ordinary tail.

Open field guide
Ocean Triggerfish SeaRealm card
OceanicFish

Ocean Triggerfish

Canthidermis sufflamen

A tough-skinned drifter with a lockable fin trigger.

Open field guide
Oceanic Whitetip Shark SeaRealm card
OceanicPredator

Oceanic Whitetip Shark

Carcharhinus longimanus

White-tipped paddle fins cruise the far open sea.

Open field guide
Octopus SeaRealm card
ReefInvertebrate

Octopus

Octopoda

A soft-bodied puzzle solver with eight sensing arms.

Open field guide
Owlfish SeaRealm card
DeepFish

Owlfish

Bathylagidae

Dinner-plate eyes scan the midnight water.

Open field guide
Oysters SeaRealm card
ReefInvertebrate

Oysters

Ostreidae

Living water filters that build bustling shell cities.

Open field guide
Pacific Grenadier SeaRealm card
DeepFish

Pacific Grenadier

Coryphaenoides acrolepis

A patient scavenger with a ribbon-like tail.

Open field guide
Peacock Squid SeaRealm card
DeepInvertebrate

Peacock Squid

Taonius spp.

Glass skin, giant eyes, and lights underneath.

Open field guide
Picasso Triggerfish SeaRealm card
ReefFish

Picasso Triggerfish

Rhinecanthus aculeatus

A swimming artwork with a clever locking spine.

Open field guide
Pilot Whale SeaRealm card
OceanicApex

Pilot Whale

Globicephala spp.

Deep-diving dolphins that stick close to their families.

Open field guide
Pompano SeaRealm card
OceanicFish

Pompano

Trachinotus carolinus

A silver beach cruiser that digs up crunchy snacks.

Open field guide
Porcupine Fish SeaRealm card
ReefFish

Porcupine Fish

Diodon hystrix

A shy night hunter that becomes a spiky balloon.

Open field guide
Queen Angelfish SeaRealm card
ReefFish

Queen Angelfish

Holacanthus ciliaris

A royal-blue reef beauty wearing a tiny forehead crown.

Open field guide
Reef Shark SeaRealm card
ReefPredator

Reef Shark

Carcharhinus melanopterus

A shallow-water shark with ink-dipped fin tips.

Open field guide
Remora SeaRealm card
OceanicFish

Remora

Echeneidae

The ocean's hitchhiker carries its own suction cup.

Open field guide
Sailfish SeaRealm card
OceanicPredator

Sailfish

Istiophorus platypterus

A color-changing sail helps herd dinner into reach.

Open field guide
Sardine Ball SeaRealm card
OceanicFish

Sardine Ball

Clupeidae

A silver swirl that makes predators dizzy.

Open field guide
Sargeant Major SeaRealm card
ReefFish

Sargeant Major

Abudefduf saxatilis

A striped reef guard with military-looking bars.

Open field guide
Sea Urchin SeaRealm card
ReefInvertebrate

Sea Urchin

Diadema antillarum

A spiky reef gardener with five self-sharpening teeth.

Open field guide
Shortfin Mako Shark SeaRealm card
OceanicApex

Shortfin Mako Shark

Isurus oxyrinchus

A warm-muscled shark shaped like a living rocket.

Open field guide
Silky Shark SeaRealm card
OceanicPredator

Silky Shark

Carcharhinus falciformis

Tiny tooth-like scales give this shark a silky glide.

Open field guide
Silverside Ball SeaRealm card
OceanicFish

Silverside Ball

Menidia menidia

A living ribbon of silver along the shore.

Open field guide
Southern Flounder SeaRealm card
ReefFish

Southern Flounder

Paralichthys lethostigma

A sideways sand ninja with both eyes upstairs.

Open field guide
Spanish Hogfish SeaRealm card
ReefFish

Spanish Hogfish

Bodianus rufus

A purple-and-yellow wrasse with a rooting piglike snout.

Open field guide
Spectacled Parrotfish SeaRealm card
ReefFish

Spectacled Parrotfish

Chlorurus perspicillatus

A Hawaiian reef grazer wearing colorful eye spectacles.

Open field guide
Sperm Whale SeaRealm card
OceanicApex

Sperm Whale

Physeter macrocephalus

The biggest toothed whale hunts by sound in darkness.

Open field guide
Spinner Dolphins SeaRealm card
ReefPredator

Spinner Dolphins

Stenella longirostris

Acrobatic night hunters that spin above the waves.

Open field guide
Swordfish SeaRealm card
OceanicApex

Swordfish

Xiphias gladius

A deep-diving hunter with a built-in sword and heater.

Open field guide
Thresher Shark SeaRealm card
OceanicPredator

Thresher Shark

Alopias vulpinus

Half shark, half tail, and all expert hunter.

Open field guide
Tiger Shark SeaRealm card
ReefApex

Tiger Shark

Galeocerdo cuvier

A striped night hunter with can-opener teeth.

Open field guide
Tripletail SeaRealm card
OceanicFish

Tripletail

Lobotes surinamensis

A sideways leaf disguise hides three pretend tails.

Open field guide
Tripod Fish SeaRealm card
DeepFish

Tripod Fish

Bathypterois grallator

Living stilts turn the seafloor into a lookout.

Open field guide
Twinspot Butterflyfish SeaRealm card
ReefFish

Twinspot Butterflyfish

Chaetodontidae

A fluttering reef disk decorated with two clever false eyes.

Open field guide
Vampire Squid SeaRealm card
DeepInvertebrate

Vampire Squid

Vampyroteuthis infernalis

A velvet cloak hides a gentle snow-eater.

Open field guide
Viperfish SeaRealm card
DeepFish

Viperfish

Chauliodus sloani

Needle fangs turn darkness into a trap.

Open field guide
Wahoo SeaRealm card
OceanicPredator

Wahoo

Acanthocybium solandri

Blue racing stripes mark one of the sea's sprinters.

Open field guide
Whale Shark SeaRealm card
OceanicFilter Feeder

Whale Shark

Rhincodon typus

The world's biggest fish wears a starry fingerprint.

Open field guide
White Grunt SeaRealm card
ReefFish

White Grunt

Haemulon plumierii

A red-mouthed reef school makes its name by grunting.

Open field guide
Yellowfin Tuna SeaRealm card
OceanicPredator

Yellowfin Tuna

Thunnus albacares

Golden fins slice warm oceans at marathon speed.

Open field guide
Yellowtail Amberjack SeaRealm card
OceanicFish

Yellowtail Amberjack

Seriola lalandi

A golden-striped traveler with a powerful forked tail.

Open field guide

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