The “Half-Shell” products from V2O are the ultimate in natural foods for marine (or freshwater) aquarium fish! These bivalves are shocked with the raw, fresh meaty parts still attached to one-half of the shell. As the product settles on the bottom aquarium substrate, the fish will hover around and pick at the meat, bit by bit, in a frenzy of natural feeding behavior until food is consumed. Some fish will even munch on the shell which can grind down teeth and aid in digestive function. The Mussel product is the strongest flavor of the 3 half-shell products. Your fish will go nuts! No other frozen food manufacturer supplies this unique product.