Great tank mates! Super friendly. Mine will come to the glass and try to interact with me when I check on the tank late at night when everything else is asleep. They also clean the fish. Only one fish in my tank, starry blenny, won't have any of it. Lol... And when I had a pair, they regularly bred. The fish ate all the babies in a matter of minutes but I am sure it was highly nutritious for them. Kinda felt bad for mom and dad though. Would have tried to breed them but apparently it is still not really doable.