Black clam

Black clam

Distribution in Scandinavian waters

Maximum length: 12,7 cm.
Appearance: The shell is round and very thick. The brown-black surface layer is usually worn away when the shell is washed up on to the beach.
Depth: 2 - 200 m.
Environment: Lives usually dug down into the sandy or clayey bottoms. The shell is quite common on the beach.
Misc: Black clams grow slowly and can be very old. In the Gullmarsfjord (Swedish west coast) an individual has been found that was 132 years old. The worm pomatoceros trqueter is seen on the shells pictured above.
Classification: The black clam is part of bivalve group under the molluscs.

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Bo Johannesson | Martin Larsvik | Lars-Ove Loo | Helena Samuelsson