EchiuridaeEchiuridae is a family of spoon worms in the suborder Echiurida. It is a monotypic family, the only genus being Echiurus. These worms burrow into soft sediment on the seabed.SpeciesThe World Register of Marine Species recognises the following species in the genus:-Echiurus abyssalis Skorikow, 1906Echiurus antarcticus Spengel, 1912Echiurus echiurus Echiurus sitchaensis Brandt, 1835