Underwater power cables affects crabs biology at a cellular level
I think there's a difference between them being "attracted" to the
short range field, and being disoriented as they climb over the cable.
Maybe it's the heat or inductive heating effect they like. EM
shielding the cables would make them too heavy. Switching to DC
transmission might fix it, but the cable loss would be higher and the
cost of rectifying and remodulating to AC would be high.Two thoughts come to mind.More cables in parallel carrying less current, which gives the added
advantage of redundancy.Short breaks in the flow, like a railway crossing for crabs, for 5
minutes or however it takes them to get unstuck and go along their
crabby business.