Grandmothers go underwater to uncover population of lethal sea snakes – video

A group of women in Noumea who swim and snorkel up to 3km five days a week have uncovered a large population of venomous sea snakes in the Baie des Citrons where scientists once believed they were rare. The citizen scientists, aged in their 60s and 70s, call themselves 'the fantastic grandmothers'. They swim with the 1.5-long lethal greater sea snakes, documenting the local population with cameras to take note of their breeding habits and share them with experts