Mark Carwardine / Killer whale or orca (Orcinus orca) lob tailing neqar freight ship, Salish Sea, Vancouver Island, British Columbia, Canada

Mark Carwardine / Killer whale or orca (Orcinus orca) swimming near freight ship, Salish Sea, Vancouver Island, British Columbia, Canada

Juergen Freund / Timelapse of Vietnamese boats picking up cruiseship passengers in Halong Bay, Vietnam, 2016.

Ashley Cooper / The Riverdance washed ashore off Blackpool, one of 3 ships lost that day off the UK. This ship was hit by a huge wave that shifted the vehicle cargo on the decks causing the ship to list violently. T...

Ashley Cooper / RAF 'Sea King' Helicopter preparing to drop salvage experts onto The Riverdance washed ashore off Blackpool. The Riverdance was one of 3 ships lost that day off the UK. The ship was hit by a huge wave...

Ashley Cooper / RAF 'Sea King' Helicopter preparing to drop salvage experts onto The Riverdance washed ashore off Blackpool. The Riverdance was one of 3 ships lost that day off the UK. The ship was hit by a huge wave...

Ashley Cooper / Coast guard looking at the 'Riverdance' washed ashore off Blackpool. The 'Riverdance' was one of 3 ships lost in one day off the coast of the UK. The ship was hit by a huge wave that shifted the vehi...

Richard Robinson / Pelagic Bottlenose dolphin (Tursiops truncatus ) rides the bow of a Maersk container ship, Northern New Zealand Editorial use only.

Philippe Clement / Two container ships / cargo vessels sailing at sunset, North Sea

Michel Roggo / Ship on the main channel of the Danube river, the Bratul Sulina, at Crisan Danube Delta Biosphere Reserve, Romania, May 2014 . Photographed for The Freshwater Project

Michel Roggo / Illulissat harbour with container ship, which brings goods twice a year. Ilulissat Icefjord UNESCO World Heritage Site, Greenland. August 2014. Photographed for The Freshwater Project

Frederique Olivier / Container ship passing through a fjord, Patagonia, Chile.