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- Major Fields of Marine Biology: Marine Biology - Ecology - Zoology - Animal Taxonomy
- Specific Fields of Marine Biology:Herpetology - Ichthyology - Planktology - Ornithology
- Biologists:Zoologists - Algologists - Malacologists - Conchologists - Biologists - Marine Biologists - Anatomists - Botanists - Ecologists - Ichthyologists
- Organisms:
- Plants: Algae - Brown Algae - Green Algae - Red Algae - Edible seaweeds -
- Invertebrates:Cnidarians - Echinoderms - Molluscs - Bivalves - Cephalopods - Gastropods
- Fish: Fish - Bony fish - Lobe-finned fish - Ray-finned fish - Cartilaginous fish - Electric fish - Fish diseases - Rays - Sharks - Extinct fish - Fictional fish - Fisheries science - Fishing - Fishkeeping - Live-bearing fish
- Reptiles and Amphibians: Marine reptiles - Sea turtles - Mosasaurs - Sauropterygians
- Mammals: Marine mammals - Cetaceans - Pinnipeds - Sirenians
- Misc.: Aquariums - Oceanaria - Agnatha - Endangered species - Aquatic biomes - Biogeographic realms - Aquatic organisms - Cyanobacteria - Dinoflaggellates