Marron grow to be the largest and attracted considerable interest in the U.S. during the 1980s. Research with marron has not been encouraging, however. Research has shown that this species grows relatively slowly (1 to 2 ounces per year even though they may obtain a size of several pounds) and tolerates a very narrow range of environmental con
ditions. It survives water temperatures between 55 and 85oF but appears to grow best between 70 and 75oF. In its natural habitat, marron live in cool streams and rivers of southwest Australia.