Coral Care

We all have our own ways of communicating. Between a certain kind of coral and a certain fish, it's a chemical thing. In this particular case, the Acropora nasuta coral sends out a signal to the goby fish when it's being touched by a seaweed that is dangerous to it. This causes the fish to find and nibble away at the seaweed: http://www.sciencenews.org/view/generic/id/346344/description/Seaweed-threatened_corals_send_chemical_SOS_to_fish