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

The present paper provides five symbiotic brachyuran crabs belonging to two families of Pilumnidae and Portunidae which are associated with echinoderms of Andaman and Nicobar Islands. They are associated with three classes of Echinodermata, such as Echinoidea,

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,