Fish and Wildlife Research Institute


Age and Growth Lab

The Age and Growth Lab is responsible for the processing and aging of fish otoliths for the purpose of stock assessment. Find out why and how we age fish.

Introduction to Aging Fish: What Are Otoliths?

Otoliths help FWRI biologists to determine age and derive age-related information as well as growth rates of various fishes.

The Otolith Sectioning Process

In 2011, the Age and Growth Lab processed and aged over 22,000 otoliths from 33 species of fish. Read this article to find out how FWRI processes and uses otoliths for research.

Saltwater Fish Otolith Photo Gallery

Researchers use otoliths, commonly known as earstones, to estimate the age of a fish. Learn more about this process and view otoliths from nearly 90 species of fish.

FWC Facts:
Sea turtles range in size from the 75- to 100-pound Kemp’s ridley to the 1,300-pound, 8-foot-long leatherback.

Learn More at AskFWC