Keep unwanted aquarium inhabitants out with this cleverly design fish trap. Use this clever trap to remove a pesky crab or other problem animal. Easily trap fish by baiting with your fishes favorite food. The sliding door has a spot where you can attach a string (fishing line works well). Wait for the fish to enter to feed and then lower the sliding door with the string. The trap will only partially drain allowing the it to be used as a temporary holding container. Prevent potentially problematic inhabitants from harming desirable aquarium species.