Lighthouse Finance has a string of aquaculture projects making use of recirculating aquaculture systems (RAS) in the works, including a 10,000 metric ton RAS salmon farm in Vietnam in partnership with Dong Nam Investment, SEA Aquaculture, Singapore-based AquAgro Projects and Israeli RAS tech specialist AquaMaof. But the investment firm's focus goes beyond land-based, CEO Roy Hoias told IntraFish.