Authorities in Western Australia are looking for a dolphin believed to have been intentionally wrapped in a shirt.
The Division of Parks and Wildlife stated the bottlenose dolphin was noticed off Bunbury, 170km (106 miles) south of Perth, on Australia Day final week.
A member of the general public took pictures of the animal earlier than alerting authorities.
Australian legal guidelines prohibit folks from interfering with dolphins or whales with out approval.
The general public has been urged to report any sightings.
The images seem to indicate the dolphin “wrapped” with a shirt or singlet vest, the division stated.
“It’s unlikely that the dolphin swam into the singlet, so this seems to be an intentional act,” it stated in a press release.
“This might have been catastrophic for the dolphin if it had lined its blowhole and restricted its respiratory.
“Sadly the animal has not been seen since.”
The division stated the utmost penalty beneath the Wildlife Conservation Act was about A$4000 (£2400, $3000).