A new fish puzzle is putting people's observational skills to the test. The image shows a number of fish swimming in a tank, but only one is unique. Can you spot it? Our community members are treated to special offers, promotions and adverts from us and our partners.

You can check out at any time. More info This clever puzzle can determine if you have a high IQ - all you need to do is identify a unique fish swimming in a tank. Eagle-eyed puzzle enthusiasts should find this one a breeze, but for novices, it might pose a challenge.

Regular brain teaser players will be aware that these puzzles can enhance cognitive function, concentration and even boost problem-solving abilities. This particular puzzle, shared by Dudolf on Instagram , encourages players to think creatively. It depicts numerous fish swimming in a tank, with the task being to spot the unique fish variant among the crowd.

Those with a high IQ should be able to identify the odd one out in mere seconds - but it's not as easy as it seems. The tank is filled with differently coloured fish, but only one has a unique colour variation. While all the fish have yellow bodies, their fins and stomachs can be green, blue, orange or yellow, creating hundreds of potential variations.

However, only one is unique - can you find it? If you haven't guessed it already, there's only one fish with three blue fins and a yellow belly. Some may have been misled by the plain yellow fish near the correct answer, but there's actually another.