HI, I have a 2 inch valentinie and he pokes around at everything, he loves the stuff that comes out of my red brain, pretty mild little bugger doesnt bother anyone and, loves brine shrimp and red algea sheets, wont touch the green stuff tho none of my fish will eat the green stuff. The neatest thing was the one time he puffed up for no apperant reason , these guys are smooth skinned and he looked like a little balloon fish all he needed was a string...LOL,,,fixit