The loggerhead is the most common sea turtle to strand in south carolina and the nesting population has declined three percent per year since records began in 1980 on july 28 1978 the loggerhead sea turtle was designated as threatened. South carolina sc facts firsts sc state symbols sc state reptile sc state reptile loggerhead sea turtle thanks to a fifth grade class from ninety six in greenwood county the loggerhead sea turtle caretta caretta became south carolinas state reptile in 1988 while loggerheads are considered the most common species of saltwater turtle in the united states their numbers are . Loggerhead turtle facts all you need to know about loggerhead sea turtles loggerhead sea turtles or caretta caretta are marine turtles on an average they grow up to lengths between 28 to 39 inches loggerhead sea turtle is the largest hard shelled turtle in the world. The loggerhead sea turtle caretta caretta or loggerhead in the united states the loggerhead sea turtle is the official state reptile of south carolina and also the state saltwater reptile of florida see also turtles portal adelita the first sea turtle tracked across an ocean basin. Fun fact the loggerhead turtle is the official state reptile of the state of south carolina description the loggerhead sea turtle is the largest hard shelled turtle in the world the average adult is about 90 cm 35 in long and weighs around 135 kg 298 lb however large specimens may reach 280 cm 110 in and 450 kg 1000 lb