You may be referring to a "Cleaner Wrasse"
kolton
Many different types of fish do this; often juveniles. Notably this is done by Cleaner Wrasse.
flounder
fungi have fruiting bodies
Mushrooms are the fruiting bodies (reproductive organs) of many types of fungi.
Hyphae .
No, there are many other species of fungi that do not have bodies of filaments (called hyphae). They call into the phyla of Chytridiomycota and Neocallimastigomycota.
Fungi
what are fungus eating habits and other adaptions
Imperfect fungi are located every where, on land ,in water,in air, in and on bodies of living and dead organisms
They have thread-like bodies, are heterotrophs and decomposers. Fungi are multicellular and eukaryotic. They gain nutrition through absorption.
Fungi generally reproduce using fruiting bodies.
Spores, as most fungi do. If the spores get onto warm moist areas of the foot, they grow producing mycelium that begin "eating" foot tissue. When the fungus matures it produces tiny fruiting bodies on the skin surface, which eventually emit spores.