pike: any of several elongate long-snouted freshwater game and food fishes widely distributed in cooler parts of the northern hemisphere
percoid fish: any of numerous spiny-finned fishes of the order Perciformes
lumbosacral plexus: a nerve plexus formed by the ventral divisions of the coccygeal and sacral and lumbar nerves; supplies the lower limbs and perineum and coccygeal area