The correct answer is option 2, turtle species. Olive Ridley is a famous species of sea turtle. They are known for their olive-colored carapace, which is the upper part of their shell. These turtles are found in warm waters of the Pacific and Indian Oceans. Olive Ridley turtles are known for their unique mass nesting behavior called arribadas, where thousands of females come ashore to lay their eggs at the same time. These turtles play a crucial role in maintaining the health of marine ecosystems as they feed on jellyfish and other invertebrates, helping to control their populations. Olive Ridley turtles are also classified as a vulnerable species due to various threats including habitat loss, entanglement in fishing gear, and illegal hunting for their meat, eggs, and shells.