Planaria / Worm/ Leech is a non-parasitic flatworm that could exist in our shrimp tanks due to lack of fish.They attach and eat any just molted and vulnerable shrimp.In order to remove these unpleasent organism, we can use this catcher to remove planaria without chemical or medication.Brand new & high qualitySo easy to remove planaria without chemical or medicationColor: TransparentWith 8 HolesHole Diameter: Approx 0.3 cm / 0.12 inchesBottom diameter: Approx 3.1 cm / 1.22 inchesTotal length: Approx 3cm / 1.18 inchPut some meat or Food that the planaria worm love into the trapperThe planaria / worm will follow the smell to crawl in the trapper from the round holesWhen they eat their fill, they could not crawl out of the trapperThe trap has a lid to it which makes it a lot easier to dispose of the wormMaterial: AcrylicPackage Contents:4x Planarians TrapperOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.