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. Aaron Pedersen explores the astounding diversity of this ocean from its depths to its surface, its temperate waters and equatorial regions.

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