kelp forest: One of the most productive and dynamic ecosystems on Earth that occur worldwide throughout temperate and polar coastal oceans.
marine biology: The scientific study of living organisms in the ocean or other marine or brackish bodies of water.
marine conservation: The protection and preservation of ecosystems in oceans and seas. It focuses on limiting and restoring human damage to marine ecosystems.
marine reptile: Reptiles such as crocodiles, sea snakes and sea turtles that have become secondarily adapted for an aquatic or semi-aquatic life in a marine environment.
marine vertebrate: Vertebrates that live in a marine environment including fish, seabirds, marine reptiles and marine mammals.
mesopelagic zone: The zone of the ocean from 200m (656 feet) to 1,000m (3,280 feet). Very little light penetrates this deep, but some semi-deep-sea creatures live here.
neritic zone: Also known as the sublittoral zone, this is the part of the ocean that extends from the low tide mark to the edge of the continental shelf and that has a relatively shallow depth extending to about 200 meters (656 feet).
oceanic trench: Long, narrow topographic depressions of the sea floor. They makeup the deepest parts of the ocean floor.
oceanography: A branch of Earth sciences that studies the Earth’s oceans and seas, including marine organisms, ecosystem dynamics, ocean currents, waves and geophysical fluid dynamics.