<a href=showthread.php?s=&postid=10430487#post10430487 target=_blank>Originally posted</a> by Shade00
This is not exactly a symbiotic relatonship... clown gobies have a habit of perching on a favorite coral. The toxins their bellies secrete are detrimental to the coral's health, and if they perch in the same place repeatedly for an extended period of time, they could potentially kill a coral.