US President Donald Trump has yet again caused a Twitter storm.
He often posts controversial material online, but this time it was more comical after he got confused with the country of Wales and the warm-blooded mammals that live in the sea.
To start a string of tweets about foreign governments, he referred to Prince Charles as "the Prince of Whales".
He went on to add: "...call the FBI about these calls and meetings? How ridiculous! I would never be trusted again. With that being said, my full answer is rarely played by the Fake News Media. They purposely leave out the part that matters."
The president was talking about his state visit to the UK where he met various members of the Royal Family.
Users were quick to reply to the blunder describing Trump as "stupid".
Many posted photos of whales to ridicule the concept of having a Prince that is in fact, a whale.
Others also pointed out the President's labelling of the Queen as Queen of England. She is Queen of the United Kingdom and Commonwealth.
The phrase "Prince of Whales" was trending on Twitter on Thursday afternoon, as people joked about the error.
It was not the first time the president, a regular tweeter, has made mistakes in his social media posts.
During his state visit, Mr Trump called London Mayor Sadiq Khan a "stone cold loser".
In a following tweet, the president also misspelled Mr Khan's name, referring to him as "Kahn". That tweet remains posted.
Mr Trump was also subjected to ridicule in 2017 when he tweeted the word "covfefe" when sending a message about the "negative press".
However, rather than ignoring the mistake, the president embraced the spelling error, tweeting six hours later: "Who can figure out the true meaning of "covfefe" ??? Enjoy!"
Trump has since corrected the 'Prince of Whales' tweet on his profile. It now reads:
