Half-million crabs killed by plastic debris on remote islands

In the first study of its kind, an IMAS-led research team estimates that around 570 000 hermit crabs have been killed on the Cocos (Keeling) Islands in the Indian Ocean and Henderson Island in the Pacific after being trapped ...

Seal takes ocean heat transport data to new depths

The Antarctic Circumpolar Current flows in a loop around Antarctica, connecting the Atlantic, Pacific and Indian oceans. It is one of the most significant ocean currents in our climate system because it facilitates the exchange ...

When reefs die, parrotfish thrive

In contrast to most other species, reef-dwelling parrotfish populations boom in the wake of severe coral bleaching.

East Africa reels from deadly floods in extreme weather

A powerful climate phenomenon in the Indian Ocean stronger than any seen in years is unleashing destructive rains and flooding across East Africa—and scientists say worse could be coming.

Madagascar's unique dugongs in danger

Scientists have used historic DNA to discover some of the highest-risk populations of the endangered dugong are so genetically distinct, losing them would be the equivalent of losing a species of elephant.

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Indian Ocean

The Indian Ocean is the third largest of the world's oceanic divisions, covering about 20% of the water on the Earth's surface. It is bounded on the north by Asia (including the Indian subcontinent, after which it is named); on the west by Africa; on the east by Indochina, the Sunda Islands, and Australia; and on the south by the Southern Ocean (or, traditionally, by Antarctica). One component of the all-encompassing World Ocean, the Indian Ocean is delineated from the Atlantic Ocean by the 20° east meridian running south from Cape Agulhas, and from the Pacific by the 147° east meridian. The northernmost extent of the Indian Ocean is approximately 30° north in the Persian Gulf. The Indian Ocean has asymmetric ocean circulation[citation needed]. This ocean is nearly 10,000 kilometres (6,200 mi) wide at the southern tips of Africa and Australia; its area is 73,556,000 square kilometres (28,400,000 mi²), including the Red Sea and the Persian Gulf.

The ocean's volume is estimated to be 292,131,000 cubic kilometers (70,086,000 mi³). Small islands dot the continental rims. Island nations within the ocean are Madagascar, the world's fourth largest island; Comoros; Seychelles; Maldives; Mauritius; and Sri Lanka. The archipelago of Indonesia borders the ocean on the east. The ocean's importance as a transit route between Asia and Africa has made it a scene of conflict. Because of its size, however, no nation successfully dominated most of it until the early 1800s when the United Kingdom controlled much of the surrounding land.

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