Troy Robinson was hit by a dolphin while surfing alone at Ellensbrook at Margaret River last month and spoke with Fairfax radio about his unusual accident on Wednesday.
Robinson said he was paddling out to catch a wave when he saw it was already occupied – by more dolphins than he had ever seen.
“Up to 10 took off in this one wave. You could see them jumping around,” he told the broadcaster.
“There was so many of them in the wave I had a feeling there was no room. I was going to get hit.
“I duck-dived and next minute I just got whacked off my board with this big thud. It just about felt like I broke my collarbone.
“It felt like a big impact … like a torpedo. It was really powerful and (the dolphin) must have been going quite fast.
“Usually, they’ve got good senses and can get around you.”
Robinson said the experience was a good story to tell his grandchildren.
“It’s pretty rare. Pretty unique.
“Better than being a shark.
“They’re not intentionally trying to hurt you. Just having fun, I guess, and they can make mistakes like humans can.”
He said he’d be wary next time he saw a large pod in the water.
The impact was so hard he had to have a plate inserted into his left forearm and is still nursing his injury.
It also punched a hole into his surfboard.