hard to tell with such a blurry pic...and i know how hard these things are to take pics of...you need a shot of its head, and it has to be much clearer then that one...
but from that pic compared to the pics i have tried to take of 500+ i have like that in my tank i think it is an okay one, and a very agressive scavenger...but i would certainly wait for a educated and informed post from leslie or someone.
you should try taking the pic on a darker plate too, or so i have heard..i think it helps with white balance and focus.