The present study deals with the first record of symbiotic crab Harrovia elegans de Man 1887 (Crustacea: Decapoda: Pilumnidae) collected from Tuticorin and Mandapam regions of Gulf of Mannar during February 2019. This crab species affiliates to family

Crustaceans are a highly diverse group. In particular, the order Decapoda represents a highly diverse order of malacostracan crustaceans. There are 7620 brachyuran species from 104 genera present globally. In India, 910 marine brachyuran crabs are reported,