Since I have started out with salt water I have seen a yellow, black and just yesterday an orange frog fish. They have been expensive but they are up there on my list of cool looking marine life. Are they compatible with each other? www.liveaquaria.com has a chart which would say yes. But at one of the stores they told me they only keep them alone. Also, their tank was more or less reef with only soft corals. Could they be put in a reef tank, knowing they eat crustacean… I guess don’t know what those are. I have a 29gallon reef, and if they are compatible with each other and won't eat the tank mates I'd almost definitely upgrade to a 75gallon-larger. I only have two maroon clowns, scooter blenny, 22 blue legged hermits, 13 turbo and 2 nasarius snails, one porcine crab and one arrow crab. Thanks for input; I don't want to have something die because I'm not informed about it. Yeah, knowledge!