Likewise, people ask, how many inches does a trout grow in a year?
Under optimal conditions, a rainbow trout can grow as much as one inch per month, but usually much less than that. If your trout grow a total of six inches per year, they are growing very well.
How big is the average trout?
Rainbow trout: 27 lbsBrook trout: 9.7 lbsLake trout: 40 lbsCutthroat trout: 23 lbs
How long does the average trout live for?
Brook trout live 3 to 6 years, brown trout live up to 20 years, lake trout live 20 or more years, and rainbow trout live a maximum of about 11 years. Brook trout are an average of 7 to 9 inches and 2 to 3 pounds, but the coasters (brook trout in Great Lakes) can reach sizes of 25 inches and 10 pounds.