Bottom trawling is one of the most widely used - and most destructive - fishing practices in the world. Dragging heavy nets across the seabed damages fragile ecosystems, depletes global fish supplies, and puts the livelihoods of small-scale fishers at risk.

In this episode of The Food Chain, Rumella Dasgupta speaks to John Worthington, one of the last remaining fishermen in Fleetwood, UK, who fears a proposed ban on bottom trawling in Marine Protected Areas could end his business. Fisheries economist Dr Rashid Sumaila of the University of British Columbia explains the global consequences of trawling, from overfishing to illegal and unregulated catches.

On the coast of West Africa, Aissata Daouda Dia, Head of Advocacy at Blue Ventures, tells us hom much coastal communities rely on local catch. Nana Kweigyah from the Canoe and Fishing Gear Owners Association of Ghana, describes how foreign industrial trawlers are devastating coastal communities. And in Malaysia, Adrian Poon of the Cinnamon Group explores the challenges of sourcing fish sustainably in a market dominated by cheaper, trawled seafood.

Producer: Izzy Greenfield