“MERFOLK” took to Piccadilly Circus in London today to protest at the devastating impact of industrial tuna fishing practices.

Campaigners from Ocean Rebellion opened a giant John West tin containing people dressed as merfolk ensnared by drifting Fish Aggregating Devices (dFADs) in front of a Tesco which sells the brand.

DFADS are floating debris — often plastic — that attract tuna and species including endangered sharks and turtles.