i bought one last year in charlotte NC. It's in my 75 with 10 b/g chromis, 2 gobies, a couple shrimp, lots on small hermits. and a newly introduced 16 inch uniform reef eel. its never bothered anything and visa versa. i just have to make sure enough food makes it past the chromis for him. i wouldn't mind getting a few more if possible. i read somewhere that they get along fine with their own kind, plus they are small. he's now 1 and a half inches. but they are expensive $50 for mine but i've seen them for more.