Andrew Forrest's Tattarang has lifted its stake in Huon Aquaculture to 18.5 per cent, less than a week after the fish-farming business received a takeover offer from meat processing giant JBS.

Andrew Forrest's Tattarang has lifted its stake in Huon Aquaculture to 18.5 per cent, less than a week after the fish-farming business received a takeover offer from meat processing giant JBS.