Yep, thats a toad fish!! We catch those quite often here in Florida when we take our net out. In fact there is one in my tank now and we just released 2 back to nature. The emperor snapper should be ok as long as you feed him well to keep his growth up, otherwise it will be lunch for the toad fish. The toad fish can get extremely large. We pulled one in last summer that was probably a good 18"-24" and what a mouth!!! They are cool when they are smaller, but we are taking mine out as they get some size to them. To much risk to other fish we like to keep.