A rescue helicopter spotted a group of tiger sharks preying on a large school of fish off the east coast of Noosa, Australia on Friday.

The crew of the helicopter said they saw more than one hundred sharks encircling the fish in a long stretch of the coastal area.

Luckily there were no swimmers in the area, but local lifeguards have been alerted.

Although known as solitary hunters, recent studies on different shark species indicate some of them follow a pattern of group hunting.