Mandy Barker's striking photographs initially resemble beautiful undersea creatures or scenes teeming with animal and plant life. But look more closely and you realise they actually show plastic waste such as carrier bags, fishing rope and children's toys, mimicking the very marine life forms they are killing.
Plastic pollution is one of the biggest environmental issues facing the planet today. Millions of tonnes of this harmful waste end up in the sea every year, and it is found in even the most remote places. It's ingested by fish, mammals and sea birds, causing countless numbers of them to suffocate or starve. It's a problem that's continually increasing.
"Something that's planned to have a few minutes' use remains for hundreds of years in the ocean," says Mandy. "Polymer scientists say that all plastic ever produced, unless it's been burned, is still on the planet somewhere, either in its original form or as nano or micro plastics. It's a horrific thought."