When you go to the beach, you’re likely to see treasure hunters walking up and down the shoreline, metal detectors in hand, on the prowl for a big score. Sometimes, though, people looking for a treasure chest full of gold coins are after the wrong thing entirely.

Ambergris is an extremely rare, waxy substance excreted by sperm whales, and it’s highly valued in the cosmetics industry. This father and son think they found a huge chunk of it on the beach near their home, and if they’re right, they’ll make a huge chunk of change!

They’re lucky Alan had some sense that it was valuable — most people would probably ignore a big, waxy blob of something they couldn’t identify!

Share this incredible video with your friends below!