#separator:tab #html:false #tags column:4 Blue whale The largest animal ever known; eats tiny krill ocean-life Humpback whale A whale famous for songs and breaching ocean-life Orca (killer whale) A large black and white dolphin that hunts in pods ocean-life Sperm whale The largest toothed whale; dives very deep ocean-life Beluga whale A small white whale of Arctic waters ocean-life Narwhal A whale with a long spiral tusk ocean-life Dolphin A smart, social marine mammal that uses echolocation ocean-life Porpoise A small relative of dolphins with a blunt snout ocean-life Manatee A gentle, slow marine mammal that eats plants ocean-life Sea otter A mammal that floats on its back and uses tools to crack shells ocean-life Walrus A large Arctic mammal with tusks ocean-life Seal A marine mammal with flippers and no external ear flaps in true seals ocean-life Sea lion A marine mammal with ear flaps and large front flippers ocean-life Polar bear An Arctic marine mammal that hunts on sea ice ocean-life Great white shark A large predator shark ocean-life Whale shark The largest fish; eats plankton ocean-life Hammerhead shark A shark with a wide, flat head ocean-life Manta ray A giant, wing-like filter feeder ocean-life Stingray A flat fish with a stinging barb on its tail ocean-life Clownfish An orange and white fish that lives among anemones ocean-life Seahorse A fish where the male carries the babies ocean-life Pufferfish A fish that swells with water when threatened ocean-life Swordfish A fast fish with a long flat bill ocean-life Tuna A fast, strong fish important for food ocean-life Salmon A fish that swims from the sea up rivers to spawn ocean-life Eel A long, snake-like fish ocean-life Anglerfish A deep-sea fish with a glowing lure ocean-life Flying fish A fish that glides above the water ocean-life Jellyfish A soft sea animal with stinging tentacles, no brain or heart ocean-life Octopus A smart mollusk with eight arms ocean-life Squid A mollusk with eight arms and two long tentacles ocean-life Giant squid A deep-sea squid with the largest eyes in the animal world ocean-life Cuttlefish A relative of squid that changes color quickly ocean-life Nautilus A shelled cephalopod with a spiral shell ocean-life Starfish (sea star) A spiny-skinned animal with arms ocean-life Sea urchin A spiny round animal ocean-life Sea cucumber A soft, sausage-shaped animal on the seafloor ocean-life Crab A crustacean with claws and a hard shell ocean-life Lobster A large crustacean with big claws ocean-life Shrimp A small crustacean with a curved body ocean-life Krill Tiny shrimp-like animals eaten by whales ocean-life Barnacle A crustacean that sticks to rocks and boats ocean-life Hermit crab A crab that lives inside a borrowed shell ocean-life Sea turtle A reptile that lives in the ocean and lays eggs on beaches ocean-life Sea snake A venomous snake adapted to the sea ocean-life Marine iguana A lizard that feeds on algae in the sea, found in the Galapagos ocean-life Penguin A flightless bird that swims ocean-life Albatross A seabird with a very long wingspan ocean-life Pelican A seabird with a throat pouch ocean-life Coral A tiny animal that builds a hard skeleton, forming reefs ocean-life Sponge A simple animal that filters water ocean-life Sea anemone A soft animal with stinging tentacles ocean-life Seaweed Algae that grows in the sea ocean-life Kelp A large brown seaweed that forms forests ocean-life Plankton Tiny living things that drift in the sea ocean-life Mollusk examples Clams, snails, oysters and octopuses ocean-life Great Barrier Reef The world's largest coral reef system, off Australia ocean-life Bioluminescence Light made by living things, as in jellyfish and anglerfish ocean-life Pod A group of whales or dolphins ocean-life School A group of fish ocean-life Baleen Plates in some whales' mouths that filter food ocean-life Blowhole The nostril on top of a whale's head ocean-life Echolocation Using sound echoes to find prey ocean-life Gills Organs fish use to get oxygen from water ocean-life Fins Body parts that help fish steer and balance ocean-life Ink A dark fluid octopuses squirt to hide ocean-life Tide pool A pocket of water left behind on a rocky shore at low tide ocean-life Intertidal zone The shore area between high and low tide ocean-life Deep sea The dark, cold part of the ocean far below the surface ocean-life Mariana Trench The deepest place in the ocean ocean-life Food chain in the sea Phytoplankton, zooplankton, small fish, larger fish and sharks or whales ocean-life Overfishing Catching fish faster than they can reproduce ocean-life