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"A fishing trawler, working to minimize unwanted bycatch and the impact of commercial fishing on untargeted species off the coast of Portugal, has caught a rare sample of a primitive shark that’s often referred to as a living fossil. The frill shark isn’t literally unknown, but it’s uncommon to catch them. It’s called a living fossil (a term also sometimes used to refer to species like the coelacanth, glypheoid lobsters, and the dawn redwood). The term refers to a species that was previously known from the fossil record, but is then discovered alive in the modern world. In the frill shark’s case, it dates back to 80 million years ago."
"Frill sharks have been caught around the world, but only rarely observed by humans. It’s been reported around the world but never in large numbers, typically at depths above 3,300 feet (the 2,300-foot depth of this catch is within the normal range). It’s an example of how poorly we understand the distribution and ecosystem role of many ocean-dwelling creatures"
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