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
superclass myriapoda: used in some classifications to encompass the millipedes (Diplopoda) and centipedes (Chilopoda); formerly a large taxon including also the Pauropoda and Symphyla; the term Myriapoda now usually used synonymously with Diplopoda and limited to the millipedes