Ghost nets are fishing nets, trawl nets, fishing traps and rope which have been abandoned, dumped or lost in the ocean by fishermen. They can entangle fish, starfish, dolphins, sea turtles, seals, sharks, seabirds, crabs and other creatures including recreational divers. The nets restrict movement and trap, causing starvation, laceration and drowning.
It can take many storms to break up the nets so they no longer threaten sea life and even when washed up on the beach they can be deadly for wildlife.
All the rope in the pictures was found on one short beach clean at Chesil beach - it included several dead seabirds.