The Indian Ocean may be the smallest of the oceans, but it is the most complex. Aaron Pedersen explores how it is home to thousands of diverse species and has a major impact on Australia’s climate.

The Pacific Ocean occupies a third of the globe’s surface and is the largest of the world’s ocean. Aaron Pedersen explores the astounding diversity of this ocean from its depths to its surface, and from its temperate waters to it equatorial regions.

The Southern Ocean is the only ocean that stretches unbroken around the globe. Aaron Pedersen explains how these cold southernmost waters of the world, reaching from Australia to encircle the Antarctic, are rich and productive.