A new host record of pea crab, Arcotheres placunae (Hornell & Southwell, 1909) (Brachyura: Pinnotheridae), in Placuna quadrangula (Philipsson, 1788) (Bivalvia: Placunidae), from the southeastern coast of India. Indian J Geo-Mar Sci. 2025;53(04):234-238. doi:10.56042/ijms.v53i04.10122