Coded wire tag

A coded wire tag (CWT) is an animal migration tracking device, specifically for tracking fish migration. It consists of a small piece of magnetized wire injected into the snout or cheek of a fish so that it may be tracked for research or fisheries management. The tags can also assist in studying the diet of birds which have eaten tagged fish.

Coded wire tag

A coded wire tag (CWT) is an animal migration tracking device, specifically for tracking fish migration. It consists of a small piece of magnetized wire injected into the snout or cheek of a fish so that it may be tracked for research or fisheries management. The tags can also assist in studying the diet of birds which have eaten tagged fish.