Penguins Are Key Indicators of Ocean Health, Study Shows

The research team collected 30,171 dive records from 74 penguins, and used a technique called hydro-acoustic survey to measure sounds in water as the penguins chased their favoured preys - sardine and anchovy, writes Stephanie Achieng' for SciDev.net.

Penguin Colony at Boulders Beach in Cape Town, South Africa.

InFocus

See What Everyone is Watching