Tigrinus: get about 2' in captivity, maybe a bit more if your lucky, very sensitive fish. Like a strong current and good areation. Will eat smaller tankmates, Difficult to get on pellets or any food for that matter. Beautiful fish, rare and expensive (8" specimine about 250$-300$, 2 footers can be 1000$+) Not too active, but more so than some other cats. Likes alot of hiding places (driftwood etc) and softer water. Its a bottom feeder/dweler (like all the cats you listed). It's nocturnal and will sometimes only eat with the lights off, or at night. that's about all the crucial stuff I can think of... Really gorgeous cats, my personal favorite.