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Olive ridley sea turtle facts for kids

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Olive ridley
Lepidochelys-olivacea-Kélonia-1.JPG
Conservation status
Scientific classification
Kingdom: Animalia
Class: Reptilia
Order: Testudines
Family: Cheloniidae
Genus: 'Lepidochelys'
Binomial name
Lepidochelys olivacea

The olive ridley sea turtle, (Lepidochelys olivacea), also called the Pacific ridley, is one of the smallest species of sea turtle. It is named for the olive-green color of its heart-shaped shell. It is one of seven marine turtles living today.

Description

Olive ridley hatchling in Mexico (8218893828)
Olive ridley hatchling
Turles nesting escobilla oxaca mexico claudio giovenzana 2010
Nesting

Growing to about 2 feet in length, the olive ridley gets its name from its olive-colored shell, which is heart-shaped and rounded.

Males and females grow to the same size; however, females have a slightly more rounded shell as compared to males.

The head's concave sides are most obvious on the upper part of the short snout.

It has paddle-like fore limbs, each having two anterior claws.

The upper parts are grayish green to olive in color, but sometimes appear reddish due to algae growing on the shell.

Hatchlings are dark gray with a pale yolk scar, but appear all black when wet. Juveniles also have three dorsal keels; the central longitudinal keel gives younger turtles a serrated profile, which remains until sexual maturity is reached.

Distribution

Lieux pontes tortue olivatre
Lepidochelys olivacea distribution map: red circles are major nesting grounds; yellow circles are minor nesting beaches.

The olive ridley turtle lives in the tropical and warm waters of the Pacific and Indian Oceans from India, Arabia, Japan, and Micronesia south to southern Africa, Australia, and New Zealand.

In the Atlantic Ocean, it has been observed off the western coast of Africa and the coasts of northern Brazil, Suriname, Guyana, French Guiana, and Venezuela. Additionally, the olive ridley has been recorded in the Caribbean Sea as far north as Puerto Rico.

Habitat

Olive ridley turtles
Two olive ridley hatchlings moving into the ocean after being released from a conservation site in Puerto Vallarta, Mexico.

Most observations are typically within 15 km of mainland shores in protected, relatively shallow marine waters (22–55 m deep).

Olive ridleys are occasionally found in open waters. The multiple habitats and geographical localities used by this species vary throughout its lifecycle.

Feeding

The olive ridley is predominantly carnivorous, especially in immature stages of the lifecycle.

Common prey items include jellyfish, tunicates, sea urchins, bryozoans, bivalves, snails, shrimp, crabs, rock lobsters, and sipunculid worms. Additionally, consumption of jellyfish and both adult fish and fish eggs may be indicative of open ocean feeding.

The olive ridley is also known to feed on filamentous algae in areas devoid of other food sources.

Captive studies have indicated some level of cannibalistic behavior in this species.

Threats

Mart new
Olive ridley entangled in a ghost net within the Maldives
Lepidochelys olivacea Landaa
Taken in a drifting net in the Maldives
Olive Ridley hatchlings in Chennai
Hatchlings in Chennai

Known predators of olive ridley eggs include raccoons, coyotes, feral dogs and pigs, opossums, coatimundi, caimans, ghost crabs, and the sunbeam snake.

Hatchlings are preyed upon as they travel across the beach to the water by vultures, frigate birds, crabs, raccoons, coyotes, iguanas, and snakes.

In the water, hatchling predators most likely include oceanic fishes, sharks, and crocodiles. Adults have relatively few known predators, other than sharks, and killer whales are responsible for occasional attacks.

On land, nesting females may be attacked by jaguars.

Economic importance

Olive ridley sea turtle laying eggs
An olive ridley sea turtle laying eggs

In the past the olive ridley has been exploited for food, bait, oil, leather, and fertilizer.

The meat is not considered a delicacy but the turtle eggs are. Egg collection is illegal in most of the countries where olive ridleys nest, but these laws are rarely enforced. Harvesting eggs has the potential to contribute to local economies, so the unique practice of allowing a sustainable (legal) egg harvest has been attempted in several localities.

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