Rajakkamangalam is a block or Panchayat Union of Kanyakumari district, India.

The centre is recognized by DST-FIST, UGC-SAP, DRS by the Government of India.

The centre is the offshoot of Madurai Kamaraj University, and later it was formed as the Institute of Artemia Research and Training inaugurated by Dr. J. Jayalalitha during early 1990s and later renamed as the Institute of Coastal Area Studies, and now is called the Centre for Marine Science and Technology with advance research activities in the areas of marine microbiology, nanobiotechnology, marine pharmacology, marine biodiversity, micro-algal technology, molecular biology, etc.

The Rajakkamangalam estuary and Azhathangarai marsh land contains a coastal ecosystem with a mangroves habitat, sand dunes and sea turtle breeding site near Azhathangarai beach.

The Rajakkamangalam estuary and Azhathangarai marsh land is considered one of the breeding and feeding grounds for many birds like painted stork, cormorant, spot billed pelicans, purple swaphen[check spelling], dabchick, garganey, purple heron, open bill stork, black winged stilt, etc.