Bar grader used in fish culture to separate small fish from larger fish.

A bar grader inside a concrete pool called a raceway, that contains water and fish.

Photo By/Credit

Sherri Shoults/USFWS

Date Shot/Created

11/07/2023

Media Usage Rights/License

Public Domain

Image

The bar grader has adjustable vertical bars and a manual dial at the top corner, graduated in fractions of an inch, used to adjust the openings between each bar.

Facility

Greers Ferry National Fish Hatchery

Recreational Activity

Fish viewing

Fishing

Species

Oncorhynchus mykiss

Subject tags

Aquaculture