Fish Tags

In order to manage California's valuable fisheries resources, biologists need to gather information about fish abundance, growth rates, age, migrations, strain identification, and stocking success.

One way to collect data is by attaching tags to planted and wild fish. Tagging can be done at a hatchery prior to planting in a California water or on location during a "catch and release" project.

Report a Tag

Tag Types and Locations

Possible Tag Locations

Dart Tag

Carlin Tag

Opercle Tag

Peterson Disc / Tag

Spaghetti Tag

T-Bar Anchor Tag

fish with thin plastic tag attached near dorsal fin
Fish with Dart Tag


For more information about fish tagging or reporting fish tags, contact the Fisheries Branch.