Two men filmed a friend surfing on the carcass of a dead Thresher shark that was being towed behind their boat, and then posted it on Facebook.
The video was taken by Mark Collins in the Western Bay of Plenty, New Zealand, and showed his friend, Eddie Bithell surfing on the body of the shark, which had been tied to a boat belonging to Zane Wright by its tail.
The footage was then posted onto Mr Collins' Facebook page last week, without Mr Bithell's permission, where it caused outrage.
The men said they had been out sword-fishing when they hooked the 289kg shark in its tail by accident.
Mr Collins said: "We didn’t know it was a shark at the time, it was only when we pulled it up and it was already dead by then."
He explained that they took the shark's body to shore, where it was left overnight. The following day they weighed it and decided to dispose of the carcass back out at sea.
By then it had been dead for around 30 hours.
Mr Collins said that it was while taking the body back out to sea that they decided to surf on it, and that was when the video was made.
He said he regretted shooting the video and putting it online without his friend's permission.
The video has since been deleted.
The Ministry for Primary Studies (MPI) investigated the shark surfing incident, but found no breach of the Animal Welfare Act.
A spokesperson for MPI said: "We've determined that there has been no breach of the Animal Welfare Act as the shark had been dead for around 30 hours before video footage was recorded.
"MPI will not be further investigating the matter."
Why not take out a subscription to Practical Fishkeeping magazine? See our latest subscription offer.