Nickel, Shedd's rescued green sea turtle, has been the star of the Caribbean Reef habitat since 2003. She came to Shedd after surviving a boat collision that left a deep gash in her shell and affected her buoyancy—but not her ability to navigate her habitat with ease and learn b...ehaviors that help us care for her. Nickel helps raise awareness about the many threats to her species, including the increasing problem of plastic marine debris, which sea turtles can mistake for food or become entangled in. Show more