I think pacific has them now.
I have 6 in my 55 gallon with angels, harlequin rasboras, cardinal tetras, cherry barbs, cories, and shrimp. No problems so far.
They have been feasting on my massive mts population, I haven't tried feeding them frozen bloodworms yet. I think they would be much more inclined to go after live foods from what I've seen, they're intelligent little critters.