A competition launched by Sky Ocean Ventures and National Geographic offers a massive financial prize to anyone able to find ways to save the oceans from plastic pollution.

The prize for the best suggestions in The Ocean Plastic Innovation Challenge is a share of $1.5m (£1.16m) in awards and investment.

Seahorse with cotton bud photographed by Justin Hofman

The deadline for entries is 11 June, with the winners being announced in December.

To find out more watch this video discussion on Sky News or visit National Geographic, Innovation Challenge Ocean Plastic