I had one, and it was aggressive when it wanted to eat, which was always. Ate a 3" blue panaque. If you keep small bottom dwellers, and anything small enough to fit in its mouth, don't get attached to them.
i had once and it grew from 2 to 12 inches in about month and a half
I put half a tablespoon per five gallons of aqaurium salt in with my cats, and they are fine!
