Sexually ripe specimens have been observed in April and May. Most probably the larvae have a planktonic development. E. longissima lives in burrows. When conditions become unfavourable it will rapidly and repeatedly move and set up a new tube at other locations. E. longissima is mainly a non-selective deposit feeder, feeding on algae and dead animals. The species itself is eaten by flatfish (Hartmann-Schröder, 1971; Wolff, 1973; Fauchald & Jumars, 1979).
- Holtmann, S.E.; Groenewold, A.; Schrader, K.H.M.; Asjes, J.; Craeymeersch, J.A.; Duineveld, G.C.A.; van Bostelen, A.J.; van der Meer, J. (1996). Atlas of the zoobenthos of the Dutch continental shelf. Ministry of Transport, Public Works and Water Management: Rijswijk, The Netherlands. ISBN 90-369-4301-9. 243 pp. http://www.marinespecies.org/aphia.php?p=sourcedetails&id=83