http://www.fish-feed-extruder.com/product/dry-type-fish-feed-extruder.html
The fish food extruder is widely used for producing floating feed pellets of all kinds of aquatic animal, sinking and floating aqua-feed pellets both can be made just by adjusting feed formulation.
Pellet feed of different sizes and densities can be made to accommodate the needs of species in various growth stages and with different babits. By using pellet feed of the appropriate size and density, loss rate and environmental pollution caused by the feed residue can be significantly reduced.