blood cockle
US /blʌd ˈkɑːkəl/
UK /blʌd ˈkɑːkəl/

1.
a type of edible bivalve mollusk, often found in Southeast Asian waters, known for its reddish flesh due to hemoglobin in its blood
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Fresh blood cockles are a popular ingredient in Malaysian and Singaporean cuisine.
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Be careful when cleaning blood cockles to remove all sand.