Two spot Blenny
 

Hello i just bought a little blenny form J&L yesturday he is very small less than 2", and has taken up residence on my aquaclear 50 powerhead... odd choice of home but i have never seen it so clean...i have had a midas blenny before but apparently these guys ONLY eats algae ? does this sound right? if so do i need to feed him some kind of special food

Thanks,
Ken

Depending on the size of your tank you may need to train him on the processed foods.
Nori (sushi roll) is a favored choice for blennys