Sea Side Aquatics new collapsible fish trap comes in 3 sizes (SM, MD, and LG). Each unit comes with an adjustable hanging and mounting bracket that can support up to 3/4" glass/acrylic panel and is compatible with rimless or euro-braced aquarium. Also included is a suspended feeding tube, to help lure unwanted fish into the trap for removal. The trap door consist of a string and lever trigger, that once the unwanted fish is inside, string is pulled and the trap door is lowered. These fish trap are fully collapsible for easy storage without taking much space until needed again.These units ship Flat with assembly required.