View Full Version : Thursday Trivia: Fish Age

Star lover
September 6th, 2018, 07:19 AM
Fishery biologists can determine the age of certain fish species by examining the patterns on their scales.

Each year of growth leaves a pattern known as an annulus. By counting the annuli (plural of annulus), biologists can determine the fish's age much the same way that foresters determine the age of a tree by counting its growth rings.