User blog comment:Lord Loss/Monster Hunter Theory... Blog/@comment-4098359-20110712124019/@comment-938987-20110712184345

I'm sure they are some fish in the bottom left corner of the volcano, probably would be quite a lot around there too, volcanoes bring up a lot of minerals which would fertilize the ocean around it.

also depends on the rock, there are most likely bacteria in the rocks or moss as well. I know there is a fish that lives off wood in the Amazon.