A tour operator has flown a pet goat over the world-famous Horizontal Falls, in Western Australia's Kimberley.

Tour operator Troy Thomas was set a challenge by his staff to try to fly Gary over the falls in a sea plane, and follow it up with a speed boat ride.

Gary is in the Kimberley with his owner, comedian Jimbo Bazoobi.

Mr Thomas says the logistics were a nightmare, but it all paid off, as Gary the goat appeared to enjoy the visit.

"I contacted a few of the authorities and went through what was necessary to get Gary out here - building him a box and getting him all strapped into the plane," he said.

"He was VIP, he had the whole plane to himself on the way out.

"It was pretty interesting; we had to have a custom built goat box built for him and we needed a forklift to assist getting that into the plane.

"He's been pretty well behaved actually."

Gary did all the things the other tourists did - he donned a hat, nametag and lifejacket and took a speed boat ride through the falls, and helped feed the nurse sharks that swim up to the platform decking.

Jimbo also came along for the ride.

Pair inseparable after case of beer changed hands

Four years ago, Jimbo bought Gary for a case of beer while doing a show in Gingin.

They have been inseparable ever since.

Nurse sharks are being fed as Gary the goat watches. ( ABC News: Natalie Jones )

Part of Jimbo's gag is pushing the limits of where it is acceptable to take a goat.

The pair has been known to be fined and kicked out of various places.

"There's a few goatists out there and we got kicked out of the Derby Hotel two nights ago," Jimbo said.

"People either love him or hate him."

Jimbo said the Horizontal Falls is certainly not Gary's first adventure, but being the first goat to see the falls topped any experience he has had.

"We've gone to Cape York so he's been Australia's most northern goat," he said.

"And this is right up there - just going in a plane and going through the Horizontal Falls."

Jimbo said there was a little coaxing to get Gary onto the plane originally, but after that he appeared to enjoy the day trip.

"Lots of corn chips. We got a box to put him on to keep the aviation people happy," he said.

"He's been on a few tinnies so he's used to boats.

"I think he freaked out most of the passengers more than anything. I think they just go 'when we signed up for this tour we didn't see any goats in the brochure'."