Dug up some baby clams from the beach. They're 'bout 1/4" in length. I smooshed a couple between my fingers, rinsed 'em real well in RO water, then dropped em in for my valentini puffer. He immediately knew what they were and went right to them. All gone within a few seconds. I wont do that very often, but it was pretty cool to watch. I have to feed him some shelled food from time to time.