An incredible canine with a ridiculously long tongue has entered the Guinness World Record books.

Mochi "Mo" Rickert, an eight-year-old St. Bernard from Sioux Falls, South Dakota, has set a new record with a tongue measuring a whopping 18.58 cm in length.

According to the Telegraph, her owner says she is regularly stopped in the street by strangers keen to grab a photo with the slobbery pet.

"It still does not seem real! Mochi is so humble, she never brags or boasts but I know that she is as proud of her new record as we are," said her owner Carla Rickert.

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"It feels truly amazing to be a part of the Guinness World Records: Amazing Animals book! We are so grateful for the opportunity to make others smile."

She adopted Mochi, who she describes as "a resilient, happy-go-lucky dog, with a big personality" from a rescue organisation six years ago.

Mo enjoys dressing up in costumes, having her picture taken, spending time with her family, or snacking on sweet potatoes, she added.

However, being a record breaker comes with its own unique challenges, with Mochi facing some breathing difficulties and sometimes needing help to pick things up off the floor.

Craig Glenday, Editor-in-Chief of Guinness World Records: Amazing Animals, said he was "very excited" to about Mochi entering the book.