12:31 PM PT -- Puka Nacua was just hit with a hefty punishment for criticizing refs this week ... as he was just fined $25,000 over the controversial comments.
Another day, and Puka Nucua is back in hot water ... this time after taking a shot at the referees on social media after the Rams' 38-37 loss on Thursday Night Football, only to quickly delete the post!
The Rams' star receiver -- who had a huge game on the field -- posted the message on X just a few minutes after his Rams squad lost to the Seahawks on a two-point conversion in overtime, which didn't come without controversy thanks to a ruling on the play that resulted in points for Seattle.