Sammy was heard on television screens using inappropriate words after playing a shot in the 34th over of the West Indies innings.
Mooney swore several times when a fielder dropped a catch in the 45th over at Saxton Oval.
They were fined under the International Cricket Council’s code of conduct, which relates to “language or a gesture that is obscene, offensive or insulting during an International match”, following Ireland’s four-wicket victory.
“Both players admitted the offences and accepted the sanction proposed by match referee Chris Broad. As such, there was no need for a formal hearing,” said an ICC statement.
Sammy, who made 89 during West Indies’ innings, said: “I’d just like to apologise to the viewers for that, especially the young kids listening.”