[00:00.10]Bull sperm whales also undertake epic voyages across the Pacific.
[00:05.94]To reach such a gargantuan size,
[00:08.42]young bulls must leave their family groups in the tropics
[00:11.69]and go in search of richer pickings.
[00:14.51]And so they head for the temperate seas of the higher latitudes.
[00:19.48]Crossing thousands of miles of ocean,
[00:22.82]many voyage to one of the greatest feeding grounds
[00:26.36]in the South Pacific - New Zealand.
[00:30.28]Its two main islands span almost 1,000 miles,
[00:34.27]and journeying south,
[00:35.57]its coastal waters become progressively cooler and weather-beaten.
[00:48.11]At 40 degrees latitude,
[00:49.48]severe westerly winds known as the Roaring Forties blast the coastline.
[00:55.62]Yet it is the foul weather
[00:57.14]that produces the abundance of life found in these cold waters.
[01:00.84]Storm-churning and colliding currents unlock the deep's great reserve of nutrients
[01:00.84]and send them to the surface.
[01:00.84]