Description: Over fishing is when fish are being caught faster than they can reproduce themselves. Scientists found that 95% of more than 1,000 coral reefs have been affected by over fishing.

Effect: The effect of over fishing is that there are no fish to eat the algae, and the coral reefs are being smothered in it, so they die,

Solution: A couple of solutions to over fishing would be to make sure that you don't fish in one area too much, and to wait for the fish to have time to reproduce themselves before you go and fish again in the same spot.