In 2011 we published a paper in Fisheries Research reporting stomach eversion in a line-caught Shortfin Mako. A few days ago, an amateur naturalist posted footage of this rather spectacular behaviour on YouTube. Filmed with a Go Pro, this time it’s from a Caribbean Reef Shark. This is actually the only species from which voluntary stomach eversion in a free-living individual has been captured on tape.
Check your footage of line-caught sharks – stomach eversion happens VERY quickly and it’s easy to miss!