A few weeks ago, some locals in Waiatāi Valley near Wairoa were devastated to find hundreds of dead eels in the Waiatāi stream.
Some of the eels, or tuna in te reo Māori, were thought to be 40 to 50 years old.
A team from Hawkes Bay Regional Council has been investigating what happened.
Council chair Sophie Siers joins Jesse with an update.
There are dead eels as far as the eye can see in the Waiatai Stream near Wairoa. Photo: Supplied