About 70 per cent of SA’s oyster breeding lines have been lost along with large numbers of fish at an SA research facility, leaving growers “desperately scrambling” to salvage their program. About 70 per cent of SA’s oyster breeding lines have been lost along with large numbers of fish at an SA research facility, leaving growers “desperately scrambling” to salvage their program. Fishing and Aquaculture Industry, Fish Latest business news