Improvements in apparatus and methods for the rearing of abalone in both on-shore and off-shore environments. An on-shore tank for growing abalone comprising an elongate base comprising, a plurality of prefabricated base portions, upright walls parallel to a longitudinal axis of the elongate base, a plurality of channels, connected to a water discharger for delivering a flow of water to each channel and a water drain, a plurality of tanks being arranged into an array. An offshore submersible container defining an enclosure for abalone, the enclosure comprising an internal surface for receiving abalone thereon, one or more apertures configured to allow water to flow through the enclosure when the container is submerged, but not to allow abalone to pass therethrough, one or more feeding ports in the container walls, and one or more feed dispensers, each dispenser comprising a receptacle for abalone feed and a mouth portion that is configured for receipt at a respective feeding port.
