A device for dispensing and distributing food for aquatic fauna, which can be fitted in aquariums or containers for holding live fish, but also in tanks for turtles and terrariums in general or similar, this device comprising a tank and means for pushing the food towards an outlet, in which the tank (11) is positioned in a substantially horizontal direction and houses a pusher-mixer (12 which occupies the internal space of the tank and consists of a shaft (17), equipped with a plurality of sloping blades (18) all facing in the same direction as the direction in which the food is pushed towards the dispensing outlet (13), and in which this dispensing outlet (13) presents a substantially vertical opening for the discharge of the food in a horizontal direction.