Fish on Man Action
This is a remora, a medium sized fish normally associated with sharks and rays. These remoras stick to the bigger fish, and so hitch a ride & pick up food scraps. When they are not with a shark or ray, they are so desperate for large, free swimming hosts that they also attach themselves to divers. Like this one did to me. It's pretty hard to take a picture of a fish on one's own leg while diving!