It's a FW stingray in the sand, a hujeta "gar", FW barracuda, characin, whatever the hell you want to call it. I also have a Polypterus, clawed frog, and a little generic red fin shark leftover from the previous tank. Having a hard time with the arowana though--aquarium is calling them "blue hybrids", some new color strain, but--no pun intended--it's five day old fish. I ain't buying it.