The small, fleshy fin on the back of all salmon and trout species, assumed to be non-functional by commercial hatcheries and removed, may be vital for the detection and response to stimuli such as touch, sound and changes in pressure.
Source: http://www.cosmosmagazine.com/news/4529/removal-trout-salmon-fin-touches-a-nerve
Gina Gershon Gina Philips Gisele Bündchen Giuliana DePandi Giulianna Ramirez Grace Park Gretha Cavazzoni
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