Scientists have been astounded with footage captured by fishermen of a rare shark encounter off the US coast.

Three fishermen were attempting to catch cod off Block Island in Rhode Island when they felt a tug on their line.

Video, shared today by the Atlantic Shark Institute, shows a large shark surfacing and snapping at the fish on their line.

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"Valerie Preler, Chris Littlefield and Chris Blansfield were fishing for cod off Block Island, RI in May when the cod they were fighting got about 100 times heavier," the Institute said on social media.

"They soon realized they were also fighting a porbeagle shark," it wrote, explaining the species' population is decreasing as it's listed as vulnerable.

"Here, most of the cod was devoured and the shark came back for the last remaining piece."

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The Atlantic Shark Institute said the species is a special research subject.

"Porbeagle sharks love these groundfish and often can't resist a fish in distress, and the tiny vibrations they put off when fighting on a line.

"(They're) one of the most beautiful and unique sharks we are researching here at the Atlantic Shark Institute."

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Porbeagle sharks are a mackerel shark in the family Lamnidae, an order that also comprises the great white shark and the now-extinct megalodon.

They are found in cool and temperature waters in the North Atlantic and in a band of temperate water in the southern Atlantic, southern Indian Ocean, southern Pacific, and Antarctic Oceans.

The Reserve Bank is expected to hike interest rates again tomorrow, heaping new mortgage pressure on millions of Aussie households whose monthly budgets are already straining.

Economist Richard Denniss of the Australia Institute predicted interest rates will rise by between 0.25 per cent and 0.4 per cent, causing "a lot of pain" for many.

Some economists think the RBA could move even more aggressively, hitting mortgage holders with a 0.5 per cent spike.

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For a 30-year, $1 million mortgage, an RBA bump of 0.25 per cent rise would increase monthly repayments by $131, with a 0.5 per cent rise translating to a hefty $265.

"The Reserve Bank has signalled we're going to see higher interest rates over the next six to 12 months," Denniss warned.

"That will mean mortgage payments rising by thousands of dollars depending on how big people's mortgages are."

Given recent jumps in inflation and increased costs of food, petrol and energy, Denniss said employers now needed to start raising wages, otherwise the government may need to "step in and push things along".

"Previously the Reserve Bank has said it wouldn't increase interest rates until wages started to rise (but) that's clearly not happening," he said.

"We're seeing the interest rates go up now and wages are yet to rise."

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Employers needed to show "some willingness" to negotiate better pay or the government and Fair Work Commission should consider intervening, he said.

According to latest CPI figures, vegetable prices rose 6.6 per cent in the first three months of the year.

Fruit prices have gone up by about 4.9 per cent, and a two-litre bottle of Coke now costs 50 per cent more.

Last month the Reserve Bank caught everyone off-guard by lifting rates by 25 basis points, when a move of 15 points was widely expected.

The RBA will make its announcement at 2.30pm (AEST) tomorrow.

Alec John Such, the bassist and a founding member of the iconic rock band Bon Jovi, has died.

He was 70.

The group on Sunday announced the death of Such, the New Jersey band's bassist from 1983 to 1994.

No details on when or how Such died were immediately available.

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A publicist for singer-songwriter Jon Bon Jovi didn't immediately respond to messages.

"He was an original," Bon Jovi wrote in a post on Twitter. "As a founding member of Bon Jovi, Alec was integral to the formation of the band."

Bon Jovi credited Such for bringing the band together, noting that he was a childhood friend of drummer Tico Torres and brought guitarist and songwriter Richie Sambora to see the band perform.

Such had played with Sambora in a band called Message.

The Yonkers, New York-born Such was a veteran figure in the thriving New Jersey music scene that helped spawn Bon Jovi.

https://twitter.com/BonJovi/status/1533520423303925761

As manager of the Hunka Bunka Ballroom in Sayreville, New Jersey, Such booked Jon Bon Jovi & The Wild Ones before joining the singer-songwriter's band.

He played with Bon Jovi through the group's heyday in the 1980s.

Such departed the band in 1994, when he was replaced by bassist Hugh McDonald.

He later rejoined the band for its induction into the Rock & Roll Hall of Fame in 2018.

"When Jon Bon Jovi called me up and asked me to be in his band many years ago, I soon realised how serious he was and he had a vision that he wanted to bring us to," said Such at the Hall of Fame induction.

"And I am only too happy to have been a part of that vision."

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A severe weather warning is in place for multiple states as an icy cold front moves across the country.

Melbourne is set for another cold week following the recent polar blast, with temperatures not set to rise above 13C in the city.

Damaging winds have also been forecast for the eastern and north-eastern parts of the state.

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Heavy winds are also coming to Sydney today, while there are warnings of blizzards in Australia's alpine regions.

Adelaide has already endured a dangerous storm, with trees felled and creeks overflowing in the state capital.

The city had its wettest day of the year so far yesterday, with 46mm falling in the CBD and almost double that in the Adelaide Hills.

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Parklands were turned into lakes and residents were trapped in their homes as trees toppled.

Gusts of up to 102km/hr were recorded, with the SES receiving more than 500 calls for help over the weekend.

The SES also resorted to distributing free sandbags at a number of Adelaide locations yesterday.

And a major rescue operation was carried out after a man was trapped in his car just west of the city, when a tree fell on it.

He was able to crawl out of his window to safety, luckily sustaining just a sore finger.

Cold and wintry weather is set to continue in Adelaide this week, though the worst of the rain has passed.

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