| Term | Definition |
|---|
| commercial extinction | Depletion of the population of a wild species used as a resource to a level at which it is no longer profitable to harvest the species |
| coral reef | Formation produced by massive colonies containing billions of tiny coral animals, called polyps, that secrete a stony substance (calcium carbonate) around themselves for protection. When the corals die, their empty outer skeletons form layers and cause the reef to grow. They are found in the coastal zones of warm tropical and subtropical oceans |
| overfishing | Harvesting so many fish of a species, especially immature fish, that not enough breeding stock is left to replenish the species and it becomes unprofitable to harvest them. |
| stream | Flowing body of surface water. Examples are creeks and rivers. |
| wetland | Land that is covered all or part of the time with salt water or fresh water, excluding streams, lakes, and the open ocean. See coastal wetland, inland wetland. |
| maximum sustainable yield | the maxium fishing level over at does go over the rate of reproduction. |
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