Learning the anatomy of each trout species will help you fish better. As you look at the upper portion of the trout, there is the dorsal fin. Following this fin is the adipose fin, which is located on the body between the dorsal fin and tail. At the end of the fish is the tail or caudal fin with the anal fin at the base of the body and by the anal opening.
Next is the ventral fin, which is found on the lower part of the body. Then, just behind the gill-cover, you will find the pectoral fin and the gill cover, which covers the gill just as it indicates. The gill cover is found behind the eye in the front portion of the fish.
Additionally, the trout has a jaw or mouth. Next, a midline runs the length of the body down the center and in a lateral pattern. Another interesting fact about trout is that this lateral line is comprised of external holes that create what is called neuromast.
This neuromast then connects to the lateral line cranial never and plays a very important part of the trout's life. To help trout "hear", this nerve serves the purpose of being a pressure detector. In fact, the frequency range is astounding, reaching from one to 200 hertz.
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