A recent study taken up by a team of researchers from the Zoological Survey of India (ZSI), Chennai, brought to light the serious threat of extinction the coral reef colonies and mangrove forests in the Palk Bay are facing. At present, only two per cent of the coral reefs survive in the area.

Global warming, siltation, release of untreated raw sewage into the water bodies and overgrowth of algae were stated to be the three important reasons for the possible disappearance of coral colonies and its associated organisms from the Palk Bay area.