Animals

Marine Life

20 marine life species across mammals, fish, mollusks, and crustaceans with habitat, size, diet, and conservation status.

20 rows6 columns0 views0 downloadsSource: NOAA / National GeographicUpdated: 2/18/2026
marine lifeanimalsoceanbiology
20 of 20 rows
Species
Type
Habitat
Size (m)
Diet
Conservation Status
Blue WhaleMammalAll major oceans30Krill (filter feeder)Endangered
Great White SharkFishCoastal and offshore temperate waters6Seals, fish, sea lionsVulnerable
Bottlenose DolphinMammalTemperate and tropical oceans worldwide3.8Fish, squid, crustaceansLeast Concern
Common OctopusMolluskTropical and temperate ocean floors1.3Crabs, crayfish, mollusksLeast Concern
Moon JellyfishCnidarianCoastal waters worldwide0.4Plankton, fish eggs, small crustaceansNot Evaluated
Green Sea TurtleReptileTropical and subtropical oceans1.5Seagrass, algae (herbivore as adult)Endangered
Giant Manta RayFishTropical and subtropical oceans7Plankton, small fish (filter feeder)Endangered
ClownfishFishTropical coral reefs, Indo-Pacific0.11Algae, zooplankton, small invertebratesLeast Concern
SeahorseFishShallow tropical and temperate waters0.15Small crustaceans, planktonVulnerable
Orca (Killer Whale)MammalAll oceans, from polar to tropical8Fish, seals, whales, squid (apex predator)Data Deficient
Hammerhead SharkFishWarm temperate and tropical coastal waters5.5Fish, squid, octopus, stingraysCritically Endangered
Starfish (Sea Star)EchinodermAll oceans, from tide pools to deep sea0.25Clams, mussels, oysters (evert stomach)Varies by species
Coral (Staghorn)CnidarianTropical shallow reef waters2Photosynthetic algae (zooxanthellae), planktonCritically Endangered
Whale SharkFishTropical and warm temperate oceans12Plankton, fish eggs, small fish (filter feeder)Endangered
AnglerfishFishDeep ocean, bathypelagic zone0.2Fish, crustaceans (lure-based ambush)Least Concern
NarwhalMammalArctic waters (Canada, Greenland, Russia)5Arctic cod, halibut, squid, shrimpLeast Concern
ManateeMammalCoastal and riverine tropical waters4Seagrass, aquatic plants (herbivore)Vulnerable
PufferfishFishTropical and subtropical oceans0.6Algae, invertebrates, shellfishLeast Concern
American LobsterCrustaceanNorth Atlantic ocean floor0.6Fish, mollusks, other crustaceans, algaeLeast Concern
Giant SquidMolluskDeep ocean, mesopelagic to bathypelagic13Deep-sea fish, other squidLeast Concern
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