The way trout feel is with low vibrations that occur under water. The frequencies are what alert the fish to any predators or prey. The midline that is located on either side of the trout's body, also known as the lateral line, is filled with canals that have fluid to help with the vibration.

Additionally, trout can feel movement of their prey and have the ability to tell one type of prey to another. This species of fish has an amazing memory so once it determines the prey's movement it keeps that movement retained in its memory so the next time that particular prey travels by, it knows if that is what it wants for dinner or not. The trout is also able to use this stored information to know that prey is not a predator.

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