Abstract: In one exemplar embodiment, a knife for de-veining, peeling and butterflying shrimp is disclosed having a handle and an elongated arcuate knife blade secured to the handle and extending forwardly thereof, the knife blade having an intermediate toothed blade portion disposed adjacent the handle and an arcuate blade portion extending forwardly of the intermediate toothed blade portion, the arcuate blade portion having a curvature approximating the body curvature of a de-headed shrimp. The arcuate blade portion has an upper convex cutting edge disposed thereon and a lower concave cutting edge adjacent the tip of the blade. The intermediate toothed blade portion has a plurality of spaced teeth aligned in a ramp configuration from front to rear adjacent the handle. When used, the knife tip is thrust through the body of a de-headed shrimp to slice the shrimp body along its longitudinal length to a depth traversed by the upper and lower cutting edges.