Why do pufferfish puff?

f83f6188-0996-45fc-9566-9dd5fe67be23

Editor's Picks
Features Post
The brightest pupils
04 October 2021
Features Post
Dealing with egg ‘fungus’
04 October 2021
Features Post
Rathbun’s tetra in the wild
13 September 2021
Fishkeeping News Post
Report: 2021 BKKS National Koi Show results
13 September 2021
Features Post
The World's forgotten fishes
16 August 2021

The simple answer - defence - as this superb National Geographic video shows.

It starts by giving a great insight into the natural habitat of Tetraodon mbu, the world's largest freshwater pufferfish.

Juveniles are shown inhabiting a shallow river, which drains into Lake Tanganyika. Their diet is crabs but they must also make sure that they don't end up on the menu of a rather ravenous otter.

Check out the video to see what happens...

Brilliant!