Normally, when reef inhabitants sense a predator coming, they hide in the nearest crevice until it leaves. Unfortunately, this does not stop the finder. Finders are false fish with three backbones and three skulls. The upper two skulls form the jaws of a mouth between them, but the lowest skull draws in water to pass over the primary gills. The lowest skull also has two curled appendages for reaching inside of crevices to grasp prey and let it go in open water where it can be outswum and caught in the true mouth. These appendages are also very sensitive to electrical current and can find even the best-hidden creature at a distance of more than ten centimeters.
Written by Daniel Noe, WayOutLife.com