The Gahirmatha Marine Turtle Sanctuary is another phenom of Bhitarakania. It is situated around 3.3 km from Dangamal and 86 km from Kendrapara Town. It is a rare ecological phenomenon. It also harbours the worlds largest known rookery of Olive Ridley sea Turtle. Gahirmatha Marine Sanctuary is the lone mass nesting spot in the Indian Ocean region and the only turtle sanctuary in Odisha. The Olive Ridley turtles move across the South Pacific to breed on the coast of Gahirmatha. Million of Olive Ridley turtles visit the beach during mass nesting every year. Olive Ridley turtles usually nest during nighttime.