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Wiki information Corculum:

Corculum
Biological Genus, Organism Classification

Corculum is a genus of small saltwater clams, marine bivalve molluscs in the family Cardiidae, the cockles. They maintain Symbiodinium dinoflagellates as symbionts.

Corculum cardissa
Organism Classification

Corculum cardissa or the heart cockle is a species of marine bivalve mollusc in the family Cardiidae. It is found in the Indo-Pacific region. It has a symbiotic relationship with dinoflagellates, which live within its tissues.