mine did grow a foot in the first year, then tapered off. He never gorges himself, although I want him to grow so we can move him into the bigger tank. I'm not sure what cross he is exactly, my LFS tag only said achara x tsn. He's the only one I've ever seen there . I never had a salfin cat so I can't compare the dorsal to . I did luck out with mine not eating other fish and being so tame. The giraffe is always getting his bummy, but they always rest next to each other or the giraffe sits underneeath the hybrid cat.