Concerns over debris littering the world’s oceans are back in the spotlight after a Canadian fishing crew found a lobster with the blue and red Pepsi logo imprinted on its claw.

Trapped in the waters off Grand Manan, New Brunswick, the lobster had been loaded on to a crate to have its claws banded when Karissa Lindstrand came across it.

Lindstrand, who drinks as many as 12 cans of Pepsi a day, quickly spotted the resemblance.

“I was like: ‘Oh, that’s a Pepsi can,’” she said. On closer look, it seemed more like a tattoo on the claw. “It looked like it was a print put right on the lobster claw.”

Neither she or any of the crew had seen anything like it. More than a week after the find, debate has swirled over how it might have come to be: some believe the lobster might have grown around a can that ended up at the bottom of the ocean. Others speculate that part of a Pepsi box somehow become stuck on the lobster.

Lindstrand disputes these theories. The image on the claw was pixelated, she said, suggesting it couldn’t have come from a can. And the image on a Pepsi box is far too large to be what she saw on the claw.

The logo looked like it came from a printed picture, but paper would have deteriorated in the ocean. “I’m still trying to wrap my brain around what exactly it was,” she said.

Recently, researchers documented nearly 38m pieces of plastic – weighing nearly 18 tonnes – that had washed up in one of the world’s most remote places: an uninhabited coral atoll in the eastern South Pacific. Scientists found hundreds of crabs scuttling about in makeshift homes made of bottle caps and cosmetic jars, with one crab even converting the inside of a doll’s head into a home.

Soon after, an expedition noted that remote Arctic beaches were heavily polluted with plastic, linking the find to plastic drifting northwards up the Atlantic from Europe and North America.

To Lindstrand, the lobster with the Pepsi imprint hints at the magnitude of rubbish ending up in the ocean. “We don’t see it floating around us when we’re out there,” she said. “I do see stuff along the shorelines that gets washed up on the beaches or the sides of the cliffs.”

After coming across the lobster, she snapped one picture before placing it – Pepsi image and all – into a crate with the other lobsters for sale.

The head captain, in hopes of placing it on display at a local restaurant along with a recently found rare, translucent lobster, has since contacted the buyer in a futile attempt to track down the lobster.

“I’m really wishing I would have kept it now,” said Lindstrand. “It’s the first time I’ve seen something like that, and it was pretty neat. Kind of bad, but pretty neat.”