Otters have been filmed eating puffaddder shysharks on the coast of False Bay, South Africa.
The attack took place off the coast of Portugal and is the latest in a string of similar incidents.
Research into the attacks, which took place in the Baltic Sea over three months in 2016, is still ongoing.
The seven foot porbeagle shark had been entangled in a piece of plastic when it was younger.
Researchers say three whales were responsible for more than 60 percent of recent attacks.
After reviewing footage of the attacks, researchers found two of the orcas involved were seriously injured.
Marine biologist describes injuries sustained by the sharks in South Africa after being hunted by orca.
Large numbers of great white sharks gather in the waters off the the Canadian province every year in the late summer and fall.
Over the past decade, the waters off Cape Cod have become one of the world's great white shark hotspots.
The bite was the second most powerful of any animal on Earth.
The parasite is a type of isopod—an ancient order of crustaceans that includes woodlice and their relatives.
The experiment was conducted by former NASA engineer and YouTuber Mark Rober.
"When you see the state of her body, you know she is going to die," said Arnaud Gauffier from WWF France
Tiger sharks travel large distances, often crossing regional, national and international boundaries.
Researchers find their eyes are covered with "dermal denticles" that help protect these organs.
Scientists recorded the video as part of research to conduct an accurate population survey of the animals that nest at the world's largest green turtle rookery.
Researchers conducted the first ever detailed study of the diets of great whites off the east coast of Australia.
Unama'ki turned away from the waters off the eastern U.S. coast and started heading deeper into the ocean at the start of April.
Crustaceans emit a wide array of sounds underwater, like many other marine animals.
Whale sharks are the largest fish in the oceans, growing to around 30 feet in length on average.
The bizarre creatures are colloquially known as "Elvis worms" due to their shiny scales being reminiscent of the King of Rock's famous sequinned suits.
The shape of the structures resemble that of complex carbon molecules known as "fullerenes," which were one of the first nanoparticles discovered by scientists.
The mature female began moving away from the U.S. east coast at the start of April.
Researchers say the journey could reveal a new white shark nursery.
An aquarium owner noticed his sea urchins covering themselves with rocks and other objects, so he started 3D printing goofy hats. But a marine biologist confirms that sea urchins are making more than fashion statements.
The shark was tagged by marine research non-profit OCEARCH in the waters off Cape Breton, Nova Scotia, Canada.
"I've gone on numerous expeditions and have never, ever, seen anything like this," said researcher Rebecca Helm.
Since he was tagged last October, Ironbound has traveled over 2,700 miles.
Ironbound was first tagged last fall in the waters off West Ironbound Island, Nova Scotia.