5 Pcs transparent acrylic 8 holes worm catch aquarium supplies planaria trap. With 8 holes as the import bottom to trap the planarian in. Take advantage of the nozzle size and shape to make the planarian easily into hard out. This product is a portable small pipe trap that can be used in aquariums. Can be fixed or thrown into the fish tank to keep it clean. The glass worm trap made of transparent glass, the catch is less than 1 MM, and will not accidentally hurt fish and shrimp. This kind of worm trap is light and portable, the crystal glass has high brightness, acid and alkali resistance, no corrosion, good flatness, no water ripples, and easy to clean.