Fish pee just like humans do to excrete metabolic wastes. Some species produce a concentrated, somewhat yellow-hued urine that is quickly dispersed in their aquatic world. Besides water, fish pee is ...

Researchers are working to prove that coral-eating fish spread corals’ symbiotic algae in their feces. If they’re right, it could open new opportunities for helping struggling reefs cope. By Derek ...

The feces of some algae-eating fish could be deadly to coral reefs while coral-eating fish could benefit reefs, according to a new study from Rice University. Grazers, or fish that consume algae and ...