Specimen collected by Celia Paine from Herm, Channel Isles. Length = 105mm.
<em>Mactra glauca</em> (Born, 1778)
Specimen collected by Tomlin or Sailisbury from Herm, Channel Isles. Length = 105mm.
Distributed from the south of Britain to the Mediterranean
Burrows in clean sand where it filter feeds on phytoplankton. If exposed by the tide it burrows deeper (to about 7cm)
Glossy shell up to about 11cm in length. Creamy white in colour with pale brown radiating rays. The inside is white tinted with pale brown. The surface is sculptured with fine concentric rings and is covered with a satin brown periostracum.