10 Facts About Bivalves

1.

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

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2.

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

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3.

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

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4.

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

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5.

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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Cambrian
6.

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

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7.

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

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8.

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.

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9.

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.

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10.

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

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