10 Facts About Bivalves

Bivalves have long been a part of the diet of coastal and riparian human populations.

Bivalves appear in the fossil record first in the early Cambrian more than 500 million years ago.

Bivalves have bilaterally symmetrical and laterally flattened bodies, with a blade-shaped foot, vestigial head and no radula.

Bivalves'sll is composed of two calcareous valves held together by a ligament.

Bivalves'sll grows larger when more material is secreted by the mantle edge, and the valves themselves thicken as more material is secreted from the general mantle surface.

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Bivalves have an open circulatory system that bathes the organs in blood .

Bivalves are a highly successful class of invertebrates found in aquatic habitats throughout the world.

Bivalves'sllfish have formed part of the human diet since prehistoric times, a fact evidenced by the remains of mollusc shells found in ancient middens.

Bivalves have been an important source of food for humans at least since Roman times and empty shells found in middens at archaeological sites are evidence of earlier consumption.

Bivalves can become toxic when they filter these microalgae out of the water.