Named due to their exceptionally large head relative to the size of their bodies. Their carapace is a distinct reddish-brown colour, and they have a more pale yellowish plastron (bottom shell).
They are the largest of all hard-shelled sea turtles, typically weighing around 130 kilograms, but have been known to weigh well over 400 kilograms. They have a lifespan of approximately 50 to 65 years.
Loggerheads are mainly carnivorous, they have powerful jaws that enable them to crack open heavy shelled marine animals and crustaceans.
They are more commonly found in cooler, sub-tropical waters as opposed to tropical waters of most species of sea turtles, although they do venture or migrate through the tropics.
They are listed as Endangered by the IUCN.