Why are Chennai’s turtles heading to Sri Lanka Dome? New tracking data reveals the answer

The Olive Ridley turtles that have been released into the ocean near Chennai are being monitored on their course as they move towards the Sri Lanka Dome, a highly fertile marine area located in the Indian Ocean. These findings have been made through a satellite telemetry experiment, which was begun in January 2026. The monitoring project has involved tagging two Olive Ridley turtles and then releasing them into the ocean. This project has been conducted jointly by the Wildlife Institute of India. Initial findings indicate definite migratory paths towards areas that are nutrient-rich and support high concentrations of marine organisms. Members of Tamil Nadu’s Environment, Climate Change, and Forests department have commented on how the study will provide valuable information regarding the behaviour of Olive Ridley turtles.According to the X (Formerly Twitter) post, shared by Additional Chief Secretary Environment, Climate Change & Forests Supriya Sahu, both tagged turtles have been tracked moving to the Sri Lanka Dome, which is an ocean seasonality feature in the Indian Ocean. This area is characterised by strong upwelling that brings nutrient-rich water near the ocean’s surface.This helps in the development of planktons, which draw fish, birds, whales, and turtles to the area. The Sri Lanka Dome is said to be one of the highly productive areas in the region. According to reports, the migration path of both turtles seems to correspond with this natural phenomenon, which becomes active from May, peaks production in July, but begins to decline by September. The tagged turtles seem to be following their natural feeding period. The migration path is an illustration of long-distance travel through international waters.The Sri Lanka Dome is not a permanent feature. It forms due to seasonal wind patterns and ocean circulation. When conditions are right, cooler waters rise from deeper layers, carrying nutrients upwards.This creates dense feeding grounds. Marine species gather quickly, making the region a temporary hotspot in the Indian Ocean. Data from the tagged turtles suggests that Olive Ridleys actively use these zones during their post-nesting migration. Their movement patterns show repeated use of productive feeding areas rather than random dispersal.Scientists involved in the study say the findings help confirm long-standing assumptions about how ocean productivity influences turtle migration. The recorded routes also show how sensitive these animals are to changes in marine conditions.The study started with the tagging of two Olive Ridley turtles off the Chennai coast in January 2026. The objective of the study is to track their movements, nesting activities, and engagement with fishing areas. The Wildlife Institute of India is conducting the study with the help of state government officials.The tag will help track the location of the animal and provide details regarding its migration in almost real-time fashion. The process may be simple but very crucial because this is going to provide concrete proof about the distance covered by these creatures after nesting along the coast of Tamil Nadu. According to initial findings, the animals tend to stay close to coastal waters for a certain amount of time before heading out to the oceans.Authorities have also indicated that Olive Ridley turtles migrating from Odisha are expected to reach the same region as per the X post shared. This suggests a shared feeding ground used by populations from different nesting sites along the eastern coast of India.Such convergence points to connected marine pathways across the Bay of Bengal and adjoining waters. The tracking study is expected to continue through multiple migration cycles. Researchers plan to observe whether the same individuals return to the same nesting beaches in Tamil Nadu after completing their oceanic movement.The findings underline the importance of protecting nesting beaches along Tamil Nadu’s coastline. Early observations suggest that turtles return repeatedly to the same shores during breeding cycles.Fishing activity and coastal disturbance remain key concerns raised by conservation teams. Monitoring data is expected to help identify areas where human activity overlaps with migration routes.The study is still in its early phase. Even so, it is already providing measurable migration maps that were not available before. Further tagging may expand the dataset and improve understanding of long-distance marine behaviour.