Don't let Bristle worms eat your prize specimens, Trap 'Em with Coralife's trapping and removal system for your reef aquarium. Bristleworms are nocturnal, reclusive animals that hide in rocks during the day, but come out at night to feed...on YOUR precious corals. By placing a small amount of bait (plankton) in the Trap 'Em and placing it in your aquarium at night wherever Bristleworms seem most active, you can safely and easily remove these pests. Comes with a sample of Freeze Dried Plankton.