| Term | Definition |
| mangrove forests | woody, specialized types of trees of the tropics that can live on the edge, where rainforests meet oceans |
| animals that live in mangrove forests | eagles, bull sharks, snappers, and monkeys |
| hydrothermal vents | geyser on the seafloor. They must use chemosynthesis instead of photosynthesis. |
| black smokers | hottest vents containing iron and sulfide |
| white smokers | coolest vents containing calcium, byrium, and silicon |
| snipe eels, giant squid, deep-sea glass squid | animals that live next to or in hydrothermal vents |
| sargasso weeds | weeds that have little air bubbles on the sides that acts as fertilizer in New Zealand. They are commonly found in the bermuda triangle and the sargasso seas. |
| seagrass beds | flowering plants from one of four plant families which grow in marine, fully saline environments |
| Manatees, baracudas, turtles, clams/scallops | animals that live in seagrass beds |
| salt marsh | a type of marsh that provides protection and a home for snails, fiddler crabs, deer, rabbits, ducks, and mice |
| rushes, sages, cord grass, pickle weed | types of salt marshes |
| cord grass | type of salt marsh plant that becomes detritus |
| coral reefs | shallow, large groups of coral all stuck together forming a reef. Symbiosis occurs here with cleaning stations and polyps. They are the most diverce marine habitat. |
| Polyp | tiny creatures that build reefs. (nocturnal, stinger barbs, zooxanthellae) |
| barrier reefs | offshore reefs |
| fringing reefs | reefs that border islands |
| atolls | an island of coral that encircles a lagoon partially or completely |
| kelp forests | a large underwater forest of kelp that can grow to 30 feet tall. These offer protection and shelter. |