ˈshētˌfish noun
Etymology: alteration (perhaps influenced by German schaid sheatfish, from Old High German sceida sheatfish, sheath) of sheathfish
: a large elongated catfish ( Silurus glanis ) of central and eastern European rivers that may attain a length of 10 feet and a weight of 400 pounds and that lacks an adipose fin and has the long anal nearly confluent with the caudal ; broadly : any of several large catfishes