ways the reefs could die

There are many ways the reefs around the would could die. Here are only SOME of the reasons why they die.

Coral Bleaching

Pollution

Fishermen>> (spear guns, which can damage the coral) (commercial poisons) (dynamite)

Overfishing>> It would damage food chains around and in the coral reefs. Thus, sea urchins can overwhelm the coral reef. Us humans fish for the predators of sea urchins, such as porcupine fish a lot, so much that the predators of the sea urchins are very rare in those areas. Used-to-be-reefs would become so covered with algae that animals cannot build new colonies for them to live in.