Scottish Dog Sniffs Out Invasive 'Sea Vomit' on Beaches

A six-year-old labrador named Sgiath is saving Scotland's coastline one sniff at a time, tracking down colonies of an invasive species nicknamed "sea vomit" that threatens to smother native marine life.

Working alongside her owner Dr. Texa Sim near Glencoe, Sgiath has located hundreds of colonies of carpet sea squirt, an organism that spreads rapidly and chokes out local species. The International Fund for Animal Welfare just named her animal of the year for her conservation work.

Dr. Sim, a marine ecologist, started with an ambitious question: Could her mountain rescue dog learn to protect the ocean too? No one had tried using dogs to tackle marine invasive species before, but Sgiath proved it was possible.

The carpet sea squirt arrived in the UK from Japan in 2008 and has spread along English, Welsh, and Scottish coasts. It looks like slime hidden among seaweed and on structures like boat docks and oyster cages, making it incredibly hard for humans to spot.

That's where Sgiath's nose comes in. At low tide, she dives under the seaweed and pinpoints exactly where the invasive species is hiding. Dr. Sim says her dog is always right.

Training Sgiath for two different jobs required teaching her two completely different signals. For mountain rescue, she barks and bounces to alert searchers. For conservation work, she gives a quiet "freeze stare" when she finds sea squirt.

"She's incredibly clever," Dr. Sim says. "Her problem solving and her ability to take on new challenges and learn so quickly are just phenomenal."

Why This Inspires

Sgiath's success shows how creative solutions can tackle environmental problems in unexpected ways. Marine biologist Dr. Martyn Kurr from Bangor University says scientists are just starting to realize that dogs can smell changes in water that signal marine invasions humans might miss completely.

The timing matters. Carpet sea squirt reproduces quickly during warm summer months, and with seas warming, it could spread even further. These invasive species cost millions of pounds every year across Europe to control and clean up.

When she's not saving coastlines or finding lost hikers, Sgiath likes to curl up in her dog blanket at home. Dr. Sim is already training a younger labrador named Uisage, expanding their team of conservation dogs.

"It began as a proof-of-concept project and has exceeded every expectation I had," Dr. Sim says.

One dog with an extraordinary nose is proving that protecting our oceans might just need more wet noses on the case.