Fish Facts: Adipose Fin – Fins and Feathers Bozeman
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Fish Facts: Adipose Fin

The adipose fin is a fin common within the trout family of fishes or salmonidae. This fin was thought to be useless for years, but it has been determined that this fin does have an important function for trout species. The small ear shaped fin is located between the dorsal fin and the caudal fin on a fish’s back. It has important sensory applications for fish when they are swimming in turbulent water. It acts as a balancing mechanism similar to a human’s inner ear. A fish that is lacking an adipose has to use its caudal fin 8% more than a fish that has it’s adipose when swimming in turbulent water. Not only is this an important fin for trout it can be very photogenic. Contact your Bozeman Fly Shop to book a 2019 guided trip and catch some trout with pretty adipose fins.