Jay,
I have been watching him (actually I think it is a female judging by the lack of whiskers so to speak) for a couple of days now. It is primarily varying shades of green to brown, sometimes lighter, sometimes darker. On occasion, after losing the trail, when the new one would start there would be a small piece (1/8 to 1/16 of an inch long) that would be whitish. This thing just eats and poos, as soon as one piece breaks off, it just starts over again.......this is probably way more inspecting, analyzing and talking of fish poo than I ever thought I would have to do...
what are your thoughts....
ltl