That's interesting, didn't know that. Anyway, this will be my last try with the shrimp... I'm afraid there is something in my tank that's eating them, instead of them eating aiptasia. These 2 I've got are doing great so far, they're trying to get my hand now everytime I need to adjust stuff in the tank. That's sooo creepy. I know they're supposed to eat the dead skin off your hand but I'm not there yet to let them So hopefully, since they're so energetic they'll get to work soon!