THIS optical illusion has baffled puzzle enthusiasts - but don't go back into your shell - give this one a go.
If you can spot the cheeky turtle hiding in the image within 10 seconds then you might have 20/20 vision.
The image shows a messy bedroom scene with objects scattered around the floor - but don't get distracted from the challenge.
Somewhere a mischievous turtle has escaped and is meandering around, can you spot him?
This task is extra difficult as there's so much happening in the scene.
Here's a clue, the turtle is hidden in plain sight.
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Have you found him?
If not don't worry the answer is included below.
Meanwhile why not try some other puzzles while you scroll.
Test your brain power and solve the questions in this test to reveal if you have a high IQ.
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Or, see if you have the eyes of a predator and spot the bird hidden among the branches.
Try and spot the three pigs not wearing party hats in this task or find the feline hiding in plain sight.
Optical illusions are anything which is made to deceive us easily through what we see.
Human curiosity means solving these perplexing puzzles can bring a great sense of satisfaction to us and not only this but they are good for our brains too.
Previously we told how the imagery is more than just find and game - some pictures can actually improve our health.
Psychologists at The University of Glasgow found that staring at an optical illusion can improve eye sight by allowing you to see small print.
And according to "These visual puzzles can give you a good mental workout that can, in turn, help you think more efficiently and solve problems more easily."
Below is the answer to the tortoise puzzle as well as some more to try.