*What is that “thing” attached to that fish?*

*What is that “thing” attached to that fish?*

This white grunt, Haemulon plumierii, has an isopod permanently attached to it below his eye and above his mouth.
http://www.scubaluis.com/white-grunt-with-an-isopod-parasite-attached-to-it-in-cozumel-mexico/