![Taken by wildlife photographer Vadim Balakin, the images show Humpback whales producing bubbles of air to catch minute plankton ready for feeding time. (Photo/IC)](http://www.ecns.cn/hd/2019/05/07/d589ddbf68244d0a95d88c750c9bd3b8.jpg)
Taken by wildlife photographer Vadim Balakin, the images show Humpback whales producing bubbles of air to catch minute plankton ready for feeding time. (Photo/IC)
![A pack of whales will exhale beneath the surface before circling around a school of fish who are “netted” by the surrounding bubbles. (Photo/IC)](http://www.ecns.cn/hd/2019/05/07/7490eaac0ad9451d8e3869e77fe8cbc6.jpg)
A pack of whales will exhale beneath the surface before circling around a school of fish who are “netted” by the surrounding bubbles. (Photo/IC)
![A pack of whales will exhale beneath the surface before circling around a school of fish who are “netted” by the surrounding bubbles. (Photo/IC)](http://www.ecns.cn/hd/2019/05/07/2449ad1f3f0748649ea89b48b1217509.jpg)
A pack of whales will exhale beneath the surface before circling around a school of fish who are “netted” by the surrounding bubbles. (Photo/IC)