Great starter fish. Mine's been with me since the beginning 4 years ago. All my online research said they only get 3 inches when adults. Mines closer to 4 inches, very picky about presenting himself, and doesn't really like other fish. He's tolerated clowns, damsels, chromises, twinspot, flasher wrasse's, and a copperband. He never fought with them(except for the twin spot, that he killed), just got a little irritable if anyone came to close to his burrow. In the past he shared his home with a frag stealing pistol shrimp. And now resides in my 24long by himself, happy as can be, once the other fish were gone he's become much more social.