Abstract: A method and apparatus for administering a fluid solution to an individual fish, wherein the fish is placed in a feeder apparatus connected to a metering device. The metering device stores a quantity of the solution. The feeder apparatus includes a hooded cavity for placement of the head of a fish and a calibrated adapter for placement into the mouth of the fish. The calibrated adapter has a throughbore communicating to the stored quantity of solution in the metering device so that triggering the metering device expels the fluid directly into the mouth of the fish.