RTBA question

[The Guy]

I just got this guy yesterday at Dave's frag swap, after he was in my tank I did some reading on RC , I guess the first thing I did wrong was I just put him in the tank and I guess I was supposed to acclimate, oh well it's done now spot fed him with Mysis and it seemed to take it well. It's got about 10-12 bulbheads, any other suggestions for food? I put him in a moderate flow area with lots of light from my AI's. I also read it's not uncommon for these guys to race around the tank to find a spot they like. I must have picked a good spot cause he's still right where I put him, although he has moved to the right a little off the piece of rubble he came on.
Here's a picture I took this morning and he seems ok.