A spectacle known as a "boiling sea" caused by bluefin tuna going into a feeding frenzy has been captured on film.
The phenomenon happened due to large numbers of the Atlantic bluefin tuna hunting together, Alex Purdie from Alderney Wildlife Trust said.
A video recorded on 8 September off Alderney showed the water churned into a white circle of breaking waves while hundreds of seabirds gathered above.
"Witnessing a shoal of tuna feeding is an unforgettable experience - our own oceanic equivalent of a pride of lions hunting wildebeest," Mr Purdie added.
[SRC] https://www.bbc.co.uk/news/articles/cgmze08e79ko
