They’re named for the Greek word planktos, meaning to drift or float ... Warming water because of climate change can have the same effects. Plankton are also threatened by microplastics ...

Swim along the edge of a coral reef and you'll often see schools of sleek, torpedo-shaped fishes gliding through the currents ...

Image caption, This murky looking water contains loads of plankton. If the sea near you looks a bit green or brown this is a great sign as it means there is plenty of plankton drifting around.

Swim along the edge of a coral reef and you’ll often see schools of sleek, torpedo-shaped fishes gliding through the currents, feeding on tiny plankton from the water column. For decades, scientists ...