Arcidae Apr 2026

: Unlike most mollusks, Arcidae often contain hemoglobin in their hemocoel, giving them a red-colored body and the name "blood cockles". This adaptation may aid survival in low-oxygen environments like mud.

Ark shells are distinguished by several unique biological features that allow them to thrive in varied benthic environments:

Complete mitochondrial genome of Anadara vellicata (Bivalvia arcidae

The family, commonly known as ark shells , is a diverse group of marine bivalve mollusks. These organisms are recognized by their distinct trapezoidal, ribbed shells and a taxodont hinge (characterized by many small, similar teeth). While primarily found in tropical and warm temperate shallow waters, they occupy a wide range of habitats—from coral reefs and rocky substrata to muddy estuarine environments. Taxonomy and Global Distribution

: A long, straight hinge line with numerous small teeth. : Unlike most mollusks, Arcidae often contain hemoglobin

: Though rare, some species are found at abyssal depths and in polar seas.

The family holds significant value both as a resource and as a subject of ecological study. : Though rare, some species are found at

Arcidae belongs to the superfamily within the order Arcoida . It is a highly species-rich family, with a conservative estimate of over 300 extant species worldwide.