I have a jaguar hybrid, not sure what his other half his, he is around 14 inches. His game is taking off the filter tubes on both filters, and trying to bite me when I put them back. He actually has hidden one tube behind his "cave" and moves the other one around wherever he pleases. His other toy is the heater. I had to buy an "indestructible" heater. By the way, "Jag" lives in a 75 gallon tank. I think his other part might be losellei ( probably misspelled, sorry). Any ideas what kind of toys might be good for him and keep him away from the filter tubes?