The fishy contents of a man's luggage have landed him in a sea of trouble, with biosecurity officers at Sydney's international airport accusing him of trying to smuggle in fighting fish, snails and shrimp.
An X-ray of the man's baggage revealed the undeclared live creatures, packed inside five foam boxes.
"As long as people continue to try and bring undesirable products across our borders, we will continue to stop them," Australian Border Force NSW regional commander, Tim Fitzgerald said.
"We are always finding new and unusual things that people are trying to smuggle into the country."
The passenger, who arrived from Vietnam on Monday, allegedly tried to sneak into Australia with two live fighting fish, live snails and live shrimp in plastic bags inside boxes.
He has been issued an infringement notice for failing to declare the creatures, with the matter referred to ABF enforcement for further investigation.
The animals could have been carrying a range of pests and diseases threatening to Australia's $2.8 billion fisheries industry, the ABF said in a statement.
The offence carries a maximum fine of $420,000 and 10 years in jail.