I hate the idea of eating crab. It is an important foodstuff, though.
The cables for offshore renewable energy emit an electromagnetic field that attracts crabs and causes them to stay where they are.
Today’s invention exploits this finding.
Sections of cable (blue) would be designed to be smooth over say a 50m length.
A slider (red) around the cable knocks crabs off into a net (white) which is periodically raised to the surface.
This also limits the numbers of crabs caught, so that they are not over exploited.
