LOL..if he had made an effort to return if maybe...sounds more like they just would have blown it off & in the end, it would have died anyways...UM BEHAVE...you ever have starfish...sometimes they get out...also in the main 135 tank, more than 1/2 of the fish are from ***** & have remained alive & WELL for months now...not ALL *****'s are horrid; that & if you wait & see if it's still there after couple weeks; well than anything that can survive that long at ***** should be more than hardy to survive establish helathy tank
(not that IT MATTERS or that I DO, but NOPE I do not)