The Aqua Medic Trap-Pest is designed to allow the Aquarist to safely remove undesirable Marine invertebrates, such as Bristle Worms, Crabs and Snails, from their Aquarium. The Aqua Medic Trap-Pest incorporates in its design an automatic, one-way curtain door that allows crabs and snails in but not out, as well as two funnels at the back end of the trap for Bristle Worms to enter through.