Ochre seastars are the main predators of limpets in rockpools. But the limpets are known to fight back.
Vancouver Island, British Columbia, Canada.
A mother walrus and her cub bond for life.
Two male kobudai fighting, Japan. When a female kobudai reaches a certain size and age she can undergo a remarkable transformation – turning from a female into a male! Once the change has occurred the new male competes with other males for the right to mate with females.
Every year, around 8 million metric tons of plastic waste enters the ocean. On the remote island of South
Georgia, in the Southern Ocean, scientists from the British Antarctic Survey have discovered that adult
wandering albatrosses are inadvertently feeding their chicks plastic, picked up in the ocean hundreds or even thousands of miles away.
Green turtles in Sipadan, Borneo, jostling for their place at a cleaning station. Here, turtles are serviced by blennies and surgeonfish who rid them of algal growth, parasites and dead skin. In return, these fish receive a nutritious meal.
Gorgeous, color-changing cuttlefish
A methane or “mud” volcano, 650 meters deep in the Gulf of Mexico, where bubbles of methane erupt from the seafloor, dragging plumes of millennia-old sediment with them as they rise. When the Blue Planet II team returned to film this scene the following day, the volcano was dormant once more.
The “Blue Planet II” team in the submersible “Nadir,” capable of reaching depths of 1,000 meters. Over two years, the team spent a thousand hours in submersibles around the world. Featuring Producer Orla Doherty.
The “Blue Planet II” team spent two years preparing for an expedition on the scientific research vessel M/V Alucia to bring two submersibles (“Deep Rover” pictured here, and “Nadir”) to Antarctica. Their aim was to be the first humans to explore what lives a thousand meters deep.
A bluntnose sixgill shark arrives to feed on the carcass of a sperm whale in the Atlantic Ocean. These large sharks have a very slow metabolism, conserving their energy in the desert of the deep sea. Scientists believe they may go for as long as a year without eating. Taken from inside “Lula,” a submersible of the Rebikoff-Niggeler Foundation.
Portuguese man-of-war at dawn. The venomous Portuguese man-of-war is not a jellyfish but a siphonophore, a colonial animal made up of specialized individuals working together. It is also known as “floating terror” as it sails with the wind, trailing tentacles that can deliver a vicious sting – painful to humans but paralyzing for fish.
Vast seagrass meadows in Shark Bay, Australia, where some of the largest undersea meadows in the world can be found. The meadows are comprised of many species including the seagrass Amphibolis Antarctica. They support great populations of seagrass grazers, such as the green turtle and the manatee as well as their predator, the tiger shark.
Scientist Alexander Vail studies the reefs around Lizard Island on Australia’s Great Barrier Reef. Warming seas can cause corals to lose their colorful algae, turning them white – a process known as coral bleaching. While filming “Blue Planet II,” the team witnessed the worst bleaching event ever recorded on the Great Barrier Reef.
In order to get the very smooth and steady shots required, cameraman Roger Horrocks used this underwater tripod while filming for the Green Seas episode in kelp forests off the Cape of Good Hope, South Africa.
Weighing over half a ton, the leatherback is largest turtle on the planet but globally, its numbers have fallen catastrophically. Sir David Attenborough travels to Trinidad to meet a remarkable community that are
trying to save these iconic giants.
Strict management of the herring fishery in Norway has saved it from complete collapse. The herring numbers are now so numerous, they have drawn in huge numbers of humpback whales and are thought to sustain perhaps the largest gatherings of orca anywhere in the world.