A Greenpeace activist displays a piece of ghost net found during a search for plastic marine debris in the high seas of the Central North Pacific Ocean. Greenpeace are highlighting the threat that plastic poses to the world's oceans.

OCEAN A large 'ghost net' inhabited by many various species of tropical fish floats under the sea during an underwater search for trash in the high seas of the Central North Pacific Ocean. Greenpeace are highlighting the threat that plastic...

Fish are mixed in with plastic tubing found in the high seas of the Central North Pacific Ocean. Greenpeace are highlighting the threat that plastic poses to the world's oceans. GREENPEACE/ALEX HOFFORD

Marine debris from a trash search by inflatable boat in the high seas of the Central North Pacific Ocean is displayed on the Heli Deck of the Greenpeace vessel MY Esperanza. Greenpeace are highlighting the threat that plastic poses to the world's...

Debris recovered after a trawl in the high seas of the Central North Pacific Ocean. Greenpeace are highlighting the threat that plastic poses to the world's oceans. GREENPEACE/ALEX HOFFORD