Appreciate the reply_ but the toadfish or freshwater lionfish or rockfish, and the eel have pretty much got my 55 locked down- my eel already downed 2 gar that were about as big as the sell fire eels around here. I was wanting something more cause the middle and top of my tank just look so bare- they eat everything that comes anywhere near. I'm just completely clueless as to what else i can put in there- might be a little while before i can upgrade so scats and monos are both out as they get to big, and they come too small, would make great snacks though- yup clueless- guess i'm better off leaving them alone.