blood cockle

US /blʌd ˈkɑːkəl/
UK /blʌd ˈkɑːkəl/
"blood cockle" picture
1.

a type of edible bivalve mollusk, often found in Southeast Asian waters, known for its reddish flesh due to hemoglobin in its blood

:
Fresh blood cockles are a popular ingredient in Malaysian and Singaporean cuisine.
Be careful when cleaning blood cockles to remove all sand.