Pacific Fly Fishers Online Fly Shop & Catalog

Used properly, the stomach pump doesn't injure fish and can unlock secrets as to what fish are feeding on. Gently insert into the fish's throat and allow the suction of the pump bulb to suck out recently eaten food items. Then put a little water into the bulb and squeeze it out into a specimen vial. The glass vial allows you to see what the insects look like in the water and their movement.