As It Happens Bright orange shark shocks and delights scientist

Marine biologist Daniel Arauz Naranjo has spent a lot of time with a lot of sharks. But he's never seen one the same colour as a Creamsicle before.

So when the marine biologist was shown footage and photographs of a bright orange nurse shark in the shallow waters off Costa Rica, he was beside himself.

"As soon as I saw it, I was like, what? That is crazy," Naranjo, executive director of Costa Rica's Rescue Center for Endangered Marine Species, told host Nil Köksal. "Wow. It's just amazing."

Naranjo has since co-authored a paper that suggests a rare combination of genetic mutations is behind the shark's unusual colouring. The findings were published last month in the journal Marine Biodiversity

Now he and his colleag

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