One of the great mysteries of nature is where temperate freshwater eels, including our very own longfin eels, go to breed. And it's a mystery that NIWA freshwater ecologists are hoping to solve, using satellite tracking.
Our Changing World's Alison Ballance went to the Waikato to meet the biologists and some - hopefully - mystery-busting eels.
Find out more about the eel tracking in Mystery of the longfin eel's breeding ground.
