Aldabra giant tortoise
Large tortoises are among the longest-lived animals. Some individual Aldabra giant tortoises are thought to be over 200 years of age, but this is difficult to verify because they tend to outlive their human observers. Adwaita was reputedly one of four brought by British seamen from the Seychelles Islands as gifts to Robert Clive of the British East India Company in the 18th century, and came to Calcutta Zoo in 1875. At his death in March 2006 at the Kolkata (formerly Calcutta) Zoo in India, Adwaita is reputed to have reached the longest ever measured lifespan of 255 years (birth year 1750). Today, Jonathan, a Seychelles giant tortoise ("A. g. hololissa"), is thought to be the oldest living giant tortoise at the age of years and Esmeralda is second at the age of years, since the death of Harriet at 176, a Galapagos giant tortoise. Esmeralda is an Aldabra giant tortoise.
Galápagos green turtle
Numbers of mature adult Galápagos green turtle are much lower than those of other green sea turtle populations; this may be why they are more genetically isolated than other populations. The carapace is dark in color, usually black to dark olive-brown, is oval in shape, and tapers toward the tail. The carapace has a distinctive formation that is more sloped or domed than individuals of other populations. The five vertebral scutes are all alike in size with a hexagonal shape and flat edges. The lateral scutes are similar in size, but only four occur along each side. The carapace is tougher than the plastron, or the underside of the shell, and is also darker in pigmentation. They have been recorded up to 84 cm in length, while other green sea turtles have been recorded up to 99 cm in length. Their legs are shaped like flippers to aide in swimming; they are broad and generally flattened. The head is rounded and lizard-like with no teeth and does not have the predominantly hooked beak like many other green sea turtles. The sexes are similar in most aspects except size; the females are slightly larger, and the males have a longer tail.