thanks for the info, I noticed the yellow color on the tails and upper fins, he is currently very active, swims all over the tank, but has not eaten any food just yet, I wonder if I have to provide a hiding spot for him..
The tank is 40g, painted all black and bare bottom, no tankmate, and just him alone.
very easy wolf to id. great for a 40 gallon. i would get one if they were for sale around here but my ck would kill the lil guy but her wont mess with my mala