That's the newly discovered Felis aquaticus
isn't it??? I've heard they're tough to keep except in VERY large aquariums because of their territorial nature and the fact that you have to include a full-sized litter box. What are your water parameters in that tank?? Felis aquaticus
requires a tank with a LOT of dissolved oxygen. On the plus side....ammonia, nitrite, and nitrate levels aren't as critical as for other species.
I've also heard that Felis aquaticus
, like the walking catfish and climbing perch, have a tendency to jump out of aquaria. Have you experienced this yet?? Hope you have a full cover!