UPDATE: Australia's immigration minister has made a humble apology for his "lame" joke about Pacific Island nations being threatened by climate change.
Dutton made the joke on Friday but it took till Sunday for an apology to be delivered.
"Obviously it was a private conversation - I should have realized the mic was there. I didn't. It was directly behind me," he said on Sky News' AM Agenda
"I made a mistake and I apologise to anyone who has taken offence to it. It was a light-hearted discussion with the PM and I didn't mean any offence to anyone."
The prime minister also weighed in on the controversy (some people dubbed #boomgate) on Saturday.
"It says something about the quality of our national conversation that a lame joke should be of more interest than something which is truly nation building and truly transforming, which reflects Australia at its best," said Abbott.
"Here we made a decision which reflects Australia at its best, and then we have a subsequent Twitter storm, which if I may say so reflects Australia at its worst."