Abstract: A fish feeder has a cylindrical feed container with a conical hopper bottom. The bottom is equipped with a bushing in which a metering head slides. The head has shallow pockets in its side surface that fill with feed when the head is in a normal position retracted into the container. The activation of a solenoid drives the metering head through the bushing to expose the pockets and allow the feed to be discharged into a fish tank. The metering heads and bushings are interchangeable to provide for different quantities of discharge and different sizes of feed. For very large size feed the metering head may be replaced with a valve, which is operated on a timed cycle to control the amount of feed dispensed. The feeder is capable of delivering feed in a particle size range from 250 microns to 4 millimeters diameter.