Loggerhead sea turtle undergoes MRI after prolonged swimming in circles Published Loggerhead sea turtle undergoes MRI A 150-pound loggerhead sea turtle was found swimming circles just off the Space Coast. Animal experts are investigating to determine if the turtle is suffering from some form of neurological disorder. ROCKLEDGE, Fla. - A 150-pound loggerhead sea turtle was found swimming circles just off the Space Coast. Animal experts are investigating to determine if the turtle is suffering from some form of neurological disorder. Officers with the Florida Fish and Wildlife Conservation Commission found her swimming inside of a lagoon in Brevard County.