Yup, I've been looking into them for years... I've always wanted one and I finally got the chance to pick one up. He currently devours bloodworms, blackworms, mysid, brine, and small crickets. He is currently in a 20 gallon with sponge filtration kept at 83 degrees F, and he's kept alone until he's large enough to be relatively stable and can go in the 180 gallon with the ray. Then, when he outgrows that tank, between him and the motoro (as well as the reticulated stingray pair, the senegal bichir, and the florida gar I hope to eventually pick up), I have an excellent excuse to upgrade to a pond.