Good Fish Guide
Razor clam
(Ensis spp.)
Also known as: Razor shell, Spoots, Bendies, Sword razor shell, Arched razor shell, Common razor shell, Razor fish
Overview
Razor clams are bivalve molluscs. There are 6 species found in British intertidal waters. 2 are of commercial importance: Ensis siliqua and E arcuatus. Spawning occurs in summer, and fertilised eggs develop into mobile larvae hours after fertilisation. The larval phase includes several stages and lasts for about 3-4 weeks, during which time they drift with the current. They then settle, attaching themselves to sand or shell by byssal threads. At around 0.5cm length juveniles burrow into sand. Relative to other commercially important bivalves, Ensis are long-lived, slow growing, and attain sexual maturity late in life. They may survive to 10-15 years and an average adult can reach a size of 12.5cm, although growth will cease by age 10. They can live in excess of 20 years. E. arcuatus reaches sexual maturity between 73 and 130 mm and E. siliqua mature between 118 - 140 mm in Scotland. They are filter feeders and normally lie vertically in the sediment with 2 small siphons, through which they feed, visible on the surface. Razor clams burrow into the sediment around the extreme low water mark and in the shallow subtidal and are capable of rapid burrowing if disturbed.
Ratings
Showing 9 results for Razor clam