A tricky brainteaser is making its rounds across the internet as eagle-eyed viewers struggle to spot a sea creature hiding amongst the fish.
Optical illusions have the ability to make individuals think outside of the box - even when they seem impossible to solve.
People are claiming that only those with a high IQ can solve this tricky puzzle within just five seconds and spot the seahorse hiding within the aquarium, the Daily Star reports.
The sea creature is hiding in plain sight amongst the well-camouflaged image, which includes a typical fish tank scene accompanied by tropical fish and snazzy accessories.
While this brainteaser may leave players scratching their heads for ages, it's a good way for people to challenge their perception.
In order to test your observation skills, those who are giving this puzzle a go should aim to spot the seahorse in five seconds.
The seahorse, which is grey-ish black in colour, is difficult to see as it's camouflaged within the image well and not immediately obvious to the human eye.
Can you see it? If not, scroll down below to see the answer...
If you're still struggling to find the species, try looking around the left side of the image.
The dark seahorse is hidden in the bottom left corner and can be seen sitting on a piece of rock.
If you enjoy testing your brain's capability, then why not check out some more optical illusions?
People are claiming that one illusion is so tough that only 'two percent' of people can see four women hidden within the image.
Alternatively, if you wanted to test if you had 'extraordinary intelligence', then try spotting the dog amongst the pandas in this photo in just seven seconds.
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