Is there any Polypterus I can keep in a 60gal long term for their entire life? I have an Endlicheri i believe. And (she) has been with me for maybe 2 months? Got her when she was probably 2.5/3inches. She has to be 6inches at least right now, she seems she doubles in thickness and length every week???. I know i gotta either sell her or get a bigger tank (most likely gunna have to sell). But i really like them, im wondering if theres a smaller species