The invention provides a method of preparing pelletised aquaculture feed for administration to farmed aquatic animals which method comprises: causing water to circulate in a loop conduit； introducing aquaculture feed pellets into water circulating in said loop conduit whereby to expose said pellets to pressure changes and thereby cause said pellets to become water- impregnated； and retrieving water- impregnated aquaculture feed pellets from said loop conduit.
