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, 1906 Echiurus antarcticus Spengel, 1912 Echiurus echiurus Echiurus sitchaensis Brandt, 1835