Optical illusions are visual tricks that deceive our brains and eyes into seeing things that are not really there. They can test our sharpness of vision by challenging us to spot fine details in the illusions. The best examples of optical illusions that test acuity are the ones where we have to find hidden objects or patterns.
These illusions can also test our peripheral vision, i.e., the ability to see things at the edges of our field of view, which can make it difficult to spot objects that are not directly in front of us. Optical illusions can also make it difficult to distinguish between colors. Optical illusions are also used in psychoanalysis to study how we perceive things.
One such illustration can be seen in the picture shared on social media, where an eel is hidden between the coral reefs.
Aromatic Brain Teaser: Spot Lipstick Within 10 Seconds
Optical Illusion 20/20 Vision Challenge: Can You Spot the Eel Hidden Between the Coral Reef?

Image Source: TIKTOK/@laurarojahs
The above picture is an optical illusion that was posted as a puzzle on social media. Exploring a challenging underwater puzzle will reveal a ray-finned marine creature and put your intelligence to the test. Challenge yourself to identify the eel hidden within the clearly visible coral reef and determine if you can reach a high level of achievement.
Individuals who can identify the eel in the coral reef within a ten-second timeframe can proudly claim to possess a high IQ.”Do you see the eel hiding here?” inquired Laura Rogers (@laurarojahs).
With only ten seconds on the clock for the optical illusion challenge, participants faced the task of locating the fish. Initially, the scene presented various hues of green in the shape of sponges and sea urchins. Challenge your visual acuity as you survey the reef in the deep blue ocean.
Hidden Kitty Illusion: Prove Your Perfect Vision in the Junkyard
Somewhere amidst the surroundings, the eel adeptly blends in, testing your observational skills. If you locate it within 10 seconds, you might be fortunate to possess 20/20 vision. Time yourself and check if you can outpace the clock swiftly.
So, your task is to find a cute little fish in this viral optical illusion. Are you up for the challenge? Let’s see if you can find the adorable eel in the picture!
Did You Pass this Vision Challenge? Where is the Eel Hiding in the Picture?
Did you manage to locate the eel within the designated time? An up-close picture of the reef revealed additional green organisms and rocks, likely having rested in the depths of the sea for numerous years. Persist in your search, for clarity, emerge nearer to the reef’s surface.
While its body may stay mostly concealed, a green and black-spotted eel may soon come into view, mouth wide open. Only the sharpest of eyes will find it. For your convenience, we have marked the eel in the image below:

Image Source: TIKTOK/@laurarojahs
The fish had successfully nestled into a crevice among other reef creatures of similar colors. If you managed to identify the eel before time elapsed, you might truly possess genius-level observation skills. If you’re an adult, it means you’ve kept your vision sharp.
Find the Hidden Dog: Only Sharp Eyes Can Spot It Among Teddies
Many adults have been puzzled by this optical illusion, but studies show that doing difficult puzzles can help you become smarter.
Optical illusions are a fun and challenging way to exercise your brain and improve your vision skills over time. They can also teach us interesting things about how our brains work. Many scientists use optical illusions to study how the brain processes visual information. We’d love to know if you can spot the eel!
Can you see the hawk? Junkyard Optical Illusion Puts Eyes to Test