Arcidae -

: Many species possess numerous small pallial eyes along their mantle margin, particularly on the posterior side, providing light sensitivity. Lifestyles : They exhibit two main ecological habits:

The family holds significant value both as a resource and as a subject of ecological study. arcidae

: A long, straight hinge line with numerous small teeth. : Many species possess numerous small pallial eyes

: Maximum species diversity occurs in the Indo-West Pacific region, where over 180 valid species in more than 30 genera are recorded. Regional Presence : Tropical West Africa : ~27 species. West Atlantic : ~20 species. Northeastern Atlantic : ~10 species. particularly on the posterior side