"Fresh water clam and Shrimp Farming." There are fresh water shrimp? This might be an idea. Could always sell them as bait along with the mealworms and earthworms. (We'll be near the coast, so there's no way we'll compete with the local shrimpers.
A firm that is responsible for a billionaire prawn farming initiative is to invest AU$800,000 (US$741,768) on the purchase and adaptation of aquaculture facilities in Exmouth, a strategy expected to bring production forward by a year. - See more at: http://aquaculturedirectory.co.uk/warl-performs-strategic-investment-to-speed-prawn-mega-project/#sthash.2OetDdEC.dpuf