Sharks are known for their acute sense of smell and hearing, but when it comes to vision, certain colors might make them wary. Research suggests that sharks are less attracted to bright colors, particularly those that contrast sharply with the surrounding environment. This knowledge can be practical for divers and swimmers who want to minimize shark encounters.

What Colors Do Sharks Avoid?

Sharks have a unique vision system that allows them to see in low light, but they are not as adept at distinguishing colors as humans are. Studies indicate that sharks tend to avoid bright, contrasting colors, such as yellow and white, which stand out against the ocean’s natural hues. This phenomenon is often referred to as "yum-yum yellow," a term used to describe the attraction sharks have to bright colors. Conversely, darker colors like blue, black, or gray can blend in more seamlessly with the ocean environment, making them less noticeable to sharks.

How Does Shark Vision Work?

Sharks have a layer of tissue in their eyes called the tapetum lucidum, which enhances their ability to see in dim light by reflecting light back through the retina. This adaptation is crucial for hunting in murky waters but limits their ability to perceive colors. Instead of seeing a wide spectrum of colors, sharks likely see the world in shades of gray, which makes high-contrast colors stand out more prominently.

Practical Tips for Avoiding Shark Attention

If you’re planning to swim, surf, or dive in shark-inhabited waters, consider these practical tips to reduce your visibility to sharks:

• Wear dark or muted colors: Choose wetsuits, swimsuits, and gear in shades of blue, black, or gray to blend in with the ocean.
• Avoid shiny accessories: Jewelry or equipment that reflects light can mimic the glint of fish scales, attracting sharks.
• Steer clear of high-contrast patterns: Bold patterns, especially those involving yellow or white, can catch a shark’s eye.

Are There Specific Colors Sharks Dislike?

While there’s no definitive evidence that sharks "dislike" specific colors, they are less likely to be drawn to colors that blend into the ocean. The focus should be on reducing contrast rather than relying on specific colors to repel sharks.

What Other Factors Attract Sharks?

Colors are just one aspect of what might attract sharks. Here are other factors to consider:

• Movement: Erratic or splashing movements can mimic the behavior of prey.
• Blood or bodily fluids: Sharks have an acute sense of smell and can detect blood from miles away.
• Time of day: Sharks are more active during dawn and dusk, which are prime feeding times.

People Also Ask

Do Sharks Prefer Certain Colors?

Sharks do not "prefer" colors in the way humans do. Rather, they are attracted to high-contrast colors that stand out in their environment. Bright colors like yellow may attract their attention due to their contrast against the ocean’s natural hues.

Can Wearing Certain Colors Prevent Shark Attacks?

While no color can guarantee prevention of shark attacks, wearing darker, less contrasting colors may reduce the likelihood of attracting sharks. It’s important to remember that other factors, such as movement and scent, also play significant roles in shark behavior.

Why Are Bright Colors Called "Yum-Yum Yellow"?

The term "yum-yum yellow" is a colloquial expression used by divers and surfers to describe the attraction sharks have to bright yellow. This color stands out against the ocean backdrop, potentially drawing sharks’ attention.

How Can Surfers Minimize Shark Encounters?

Surfers can minimize shark encounters by avoiding surfing during peak feeding times (dawn and dusk), wearing dark wetsuits, and refraining from wearing shiny accessories. Staying in groups can also help, as sharks are less likely to approach larger gatherings.

What Should You Do If You See a Shark?

If you see a shark while swimming or diving, remain calm and avoid sudden movements. Slowly back away while maintaining eye contact with the shark. If you’re in a group, stay together to appear larger and more intimidating.

Conclusion

Understanding what colors sharks are less likely to be drawn to can be a useful strategy for those spending time in shark-inhabited waters. By wearing darker, muted colors and avoiding high-contrast patterns, you can reduce your visibility to sharks. However, it’s essential to consider other factors such as movement and scent, which also influence shark behavior. Stay informed and take appropriate precautions to enjoy the ocean safely.