I need help identifying a growth on my common pleco (next to his dorsal fin). It started out as a small red spot, which erupted into a small blister or bubble-like growth. This then developed multiple jelly-like bubbles, one of which has a neck. Lymphocystis?? Digenean trematodes?? Epistylis ?? Epit...

Mantua, Ohio, USA A little town east of Cleveland.