Category Archives: Marine life

Australians ingest a credit card’s worth of plastic a week – so what’s it doing to us?

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Citizen science project mapping microplastics menace in hope of halting spread

Head down to Sydney’s Manly Cove on a weekend, and you might see groups of people crouching diligently on the sand. They’re not searching for shells or bloodworms, but something just as visually striking, not least because it shouldn’t be there: coloured pieces of hard plastic, fragments of polystyrene foam and fibres from fishing line.

For the last three years, a group of volunteers has been surveying the beach each month for microplastics, as part of the Australian Microplastics Assessment Project.

Colloquially known as Ausmap, the citizen science project has collected more than 3.5m pieces of microplastic from more than 300 beaches around the country, ranging from Thursday Island in the north to Bruny Island, off Tasmania’s south-east coast.

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How ‘super-enzymes’ that eat plastics could curb our waste problem

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Nudged along by scientists and evolution, micro-organisms that digest plastics have the potential to create an efficient method of recycling

Beaches littered with plastic bottles and wrappers. Marine turtles, their stomachs filled with fragments of plastic. Plastic fishing nets dumped at sea where they can throttle unsuspecting animals. And far out in the Pacific Ocean, an expanse of water more than twice the size of France littered with plastic waste weighing at least 79,000 tonnes.

The plastic pollution problem is distressingly familiar, but many organisations are working to reduce it. Alongside familiar solutions such as recycling, a surprising ally has emerged: micro-organisms. A handful of microbes have evolved the ability to “eat” certain plastics, breaking them down into their component molecules. These tiny organisms could soon play a key role in reducing plastic waste and building a greener economy.

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Shock in France after giant trawler sheds 100,000 dead fish off coast

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Environmentalists spot floating carpet of blue whiting covering thousands of square metres after spill from the FV Margiris

Dutch-owned trawler FV Margiris, the world’s second-biggest fishing vessel, has shed more than 100,000 dead fish into the Atlantic Ocean off France.

France’s maritime minister, Annick Girardin, called the images of the dead fish – which formed a floating carpet of carcasses spotted by environmental campaigners – “shocking” and has asked the national fishing surveillance authority to launch an investigation.

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Iceland to end whaling in 2024 as demand dwindles

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Japan’s return to commercial whaling in 2019 has left few buyers for Iceland’s meat

Iceland, one of the only countries that still hunts whales commercially, along with Norway and Japan, plans to end whaling from 2024 as demand dwindles, the fisheries minister has said.

“There are few justifications to authorise the whale hunt beyond 2024,” when current quotas expire, Svandis Svavarsdóttir, a member of the Left Green party, wrote in Morgunblaðið newspaper.

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Super corals: the race to save the world’s reefs from the climate crisis – in pictures

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Few corals are safe from warming oceans, a new study warns, but studies are finding surprisingly hardy corals, natural sunscreens and how coral ‘IVF’ can regrow reefs

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Extreme heat in oceans ‘passed point of no return’ in 2014

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Formerly rare high temperatures now covering half of seas and devastating wildlife, study shows

Extreme heat in the world’s oceans passed the “point of no return” in 2014 and has become the new normal, according to research.

Scientists analysed sea surface temperatures over the last 150 years, which have risen because of global heating. They found that extreme temperatures occurring just 2% of the time a century ago have occurred at least 50% of the time across the global ocean since 2014.

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‘Families are starving’: Chinese trawlers’ overfishing is destroying lives, say Sierra Leoneans

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As illegal industrial-scale fishing by foreign fleets pillages fish populations, despairing coastal communities feel powerless

Along Tombo’s crumbling waterfront, dozens of hand-painted wooden boats are arriving in the blistering midday sun with the day’s catch for the scrum of the market in one of Sierra Leone’s largest fishing ports.

In a scrap of shade at the bustling dock, Joseph Fofana, a 36-year-old fisherman, is repairing a torn net. Fofana says he earns about 50,000 leone (£3.30) for a brutal, 14-hour day at sea, crammed in with 20 men, all paying the owner for use of his vessel. “This is the only job we can do,” he says. “It’s not my choice. God carried me here. But we are suffering.”

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Orcas recorded killing and feeding on blue whales in brutal attacks

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Research is first to document coordinated female-led pods ramming world’s largest animal and eating its tongue before it dies

From snatching sea lions off beaches to stunning fish with a strike of their tails, orcas are renowned for their highly specialised hunting techniques passed down over generations. Now, for the first time, killer whales have been recorded hunting the planet’s largest animal – the blue whale – in coordinated and brutal attacks.

Female-led pods of killer whales, also known as orcas, have been recorded killing and eating blue whales in three separate attacks off the coast of Australia since 2019, according to a paper published in Marine Mammal Science.

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Coral crusaders: Costa Rica’s young divers learn to protect their seas

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In Puerto Viejo, scuba diving was once just for tourists, but a centre is training young people with few opportunities to care for the ocean on their doorstep

“I put fresh almond leaves in your underwater masks as anti-fogging – a way to avoid using chemicals. You can remove them once in the water, just before diving,” says Salim Vasquez, 14, pushing her dreadlocks away from her mask.

She distributes the equipment to her fellow divers, who are aged between 14 and 24, and Ana María Arenas, a group coordinator. It is 8am on a cloudy Sunday morning in Puerto Viejo, a Jamaican-inspired city in the south of Costa Rica. The young conservationists are preparing to dive into the Caribbean water for their weekly reef monitoring.

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The 90-year-old Australian fish who likes belly rubs is likely oldest aquarium fish – video

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A primitive Australian fish living in a San Francisco museum is believed to be the oldest living aquarium fish in the world. Methuselah is a four-foot-long (1.2-meter) Australian lungfish, weighing around 40lb (18.1kg). The species has both lungs and gills and is believed to be the evolutionary link between fish and amphibians. The lungfish was brought to the San Francisco museum in 1938 from Australia and now lives at the California Academy of Sciences. The species is threatened and can no longer be exported from Australian waters so biologists at the academy say it's unlikely they'll get a replacement once Methuselah passes away

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‘Terrorising us’: bluebottles wash up on Australian beaches in ‘gobsmacking numbers’

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There’s still much to learn about these ‘strange alien creatures’, but climate change likely to create ideal breeding conditions, expert says

Armadas of alien-like sea creatures have been washing up on Australian beaches thanks to the warm weather but experts warn people should look but not touch.

Jellyfish expert Dr Lisa-ann Gershwin said bluebottles had been washing up on beaches across New South Wales, Victoria, South Australia and Tasmania in “gobsmacking numbers” over the last few months thanks to the warmer weather.

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‘It’s mind-boggling’: the hidden cost of our obsession with fish oil pills

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The market in this prized commodity is worth billions – but are the supposed benefits worth the cost to global ecosystems?

• Revealed: many common omega-3 fish oil supplements are ‘rancid’

Scanning the shelves and internet for fish oil is a dizzying task. There are dozens of brands available and, although the typical consideration for the popular supplement is that quality matters most, it is not the only factor.

These prized products travel a long way before being labelled as “pure” and “fresh” – starting with the industrial-scale grinding down of a tiny fish that is crucial for healthy ocean and food systems.

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Meet Mr Trash Wheel – and the other ingenious tools that eat river plastic

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From ‘bubble barriers’ to floating drones, a host of new projects aim to stop plastic pollution before it ever reaches the ocean

The Great Bubble Barrier is just that – a wall of bubbles. It gurgles across the water in a diagonal screen, pushing plastic to one side while allowing fish and other wildlife to pass unharmed.

The technology, created by a Dutch firm and already being used in Amsterdam, is being trialled in the Douro River in Porto, Portugal, as part of the EU-supported Maelstrom (marine litter sustainable removal and management) project.

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Plastic beads could make nets more visible to cetaceans, scientists say

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Beads add hardly any extra weight to fishing gear and could save thousands of lives, it is claimed

Simple plastic beads could save the lives of some of the thousands of porpoises and other cetaceans that get caught in fishing nets each year, scientists say.

Harbour porpoises use echolocation to find their prey and for orientation. However, their acoustic signals cannot pick up the mesh of a gillnet, and as a result they often become trapped.

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I spent my house deposit on a boat to reach the Mokohinau Islands – the magic on our doorstep | Clarke Gayford

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It wasn’t a financially astute move but it led to my TV series and helped me discover the truly important things in life

  • Guardian writers and readers describe their favourite place in New Zealand’s wilderness and why it’s special to them

My entire experience of Auckland changed when I got a boat. It was the perfect antidote to a professional DJ lifestyle, where getting up at 5am to be on the water become immeasurably preferable to coming home at 5am from work. On trips out I began sticking my head underwater with such vigour that I somehow turned it into a whole new profession.

It didn’t happen straight away, of course. My 40-year-old, 14-foot beige fibreglass boat with a semi-reliable two-stroke engine, named Brown Thunder, only had so much range, and my real goal lay much farther offshore, tantalisingly out of reach. A place where tales of clear blue tropical water and huge fish swirled around a group of uninhabited islands, teasing me from the pages of marine magazines or the crusty lips of old salty sea-mates.

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Japan’s whaling town struggles to keep 400 years of tradition alive

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The resumption of killing whales for profit for the first time in over 30 years is offering little cause for celebration

You don’t have to look far to find evidence of Wada’s centuries-old connection to whaling. Visitors to the town on Japan’s Pacific coast are greeted by a replica skeleton of a blue whale before entering a museum devoted to the behemoths of the ocean.

At a local restaurant, diners eat deep-fried whale cutlet and buy cetacean-themed gifts at a neighbouring gift shop. At the edge of the water stands a wooden deck where harpooned whales are butchered before being sold to wholesalers and restaurants.

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California officials close beaches after man dies in shark attack

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Thirty-one-year-old man, who appeared to be a bodyboarder, pronounced dead in San Luis Obispo county

California authorities have closed some beaches in San Luis Obispo County after a 31-year-old man was pronounced dead following an encounter with a shark on Friday.

The fatality marked the first death in a shark attack in 18 years in the area, which lies roughly midway between Los Angeles and Jan Jose.

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First evidence that leopard seals feed on sharks, researchers say

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The unusual discovery in New Zealand waters is based on the remains of scat and scars on seal’s bodies

In a world first, New Zealand leopard seals have been found to feed on sharks, making them part of a tiny and exclusive club of marine predators that do so.

The study, led by Krista van der Linde of leopardseals.org, found shark remains in the scat of leopard seals, and visible signs of struggle with sharks on seals’ bodies, indicating the marine mammals predate on sharks, rather than scavenge their remains.

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Coastal species are forming colonies on plastic trash in the ocean, study finds

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Termed “neopelagic communities”, these colonies are thriving in the Great Pacific Garbage Patch and going where the current flows

Masses of ocean plastic are providing artificial habitat for otherwise coastal species, according to a new study published in the peer-reviewed journal, Nature Communications.

The study’s authors observed floating water bottles, old toothbrushes and matted fishing nets. The possibility exists that species may be evolving to better adapt to life on plastic.

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Whoops and grunts: ‘bizarre’ fish songs raise hopes for coral reef recovery

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Vibrant soundscape shows Indonesian reef devastated by blast fishing is returning to health

From whoops to purrs, snaps to grunts, and foghorns to laughs, a cacophony of bizarre fish songs have shown that a coral reef in Indonesia has returned rapidly to health.

Many of the noises had never been recorded before and the fish making these calls remain mysterious, despite the use of underwater speakers to try to “talk” to some.

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