Science debunks myth that sharks bite based on color, specifically ‘yum yum yellow’.

Science debunks myth that sharks bite based on color, specifically 'yum yum yellow'.

Why Wearing Bright Colors May Not Provoke Shark Attacks

You may have heard the tale of the stranded men at sea, desperately waiting for rescue but getting picked off by sharks one by one. Strangely enough, the men wearing orange pilot suits were the ones attacked, while those in green khaki suits were left unharmed. This story, shared by shark biologist Samuel Gruber in a 1970s US Navy documentary, sparked the Navy’s interest in understanding shark behavior and led to the investigation into whether bright colors provoke shark attacks. Thus, the myth of “yum-yum yellow” was born.

Although Gruber’s research confirmed that sharks have sharp vision, it fell short of reaching any conclusions about color preferences. However, recent studies have provided valuable insights into shark vision, debunking the theory that sharks are attracted to people wearing yellow or orange swimsuits.

Contrary to popular belief, most species of sharks can’t see color. Humans possess three types of cones in their eyes, enabling them to perceive a broad range of colors in the visible light spectrum. In contrast, sharks only have one type of cone, limiting their vision to shades of black, white, and gray. Nevertheless, because their eyes are highly sensitive to light, they can still distinguish differences between colors and perceive their vibrancy.

According to Gavin Naylor, director of the University of Florida’s Program for Shark Research, when sharks encounter swimmers wearing bright colors, they don’t see the specific shade but rather the contrast against their watery surroundings. The stark contrast makes it easier for sharks to spot individuals in bright colors and, should they be in an attacking mood, potentially target them. This heightened sensitivity to light and ability to discern color differences likely evolved to aid sharks in their hunting and survival in deep, dark waters and at twilight.

However, it’s important to note that wearing bright colors does not guarantee shark attacks. The sharks’ attraction may be more related to their ability to see people more clearly against the contrasting background. Therefore, if you find yourself in a dangerous situation and want to be easily spotted by rescuers, yellow and orange are still considered the best colors to wear. The mild risk of attracting a shark is outweighed by the increased chances of being rescued promptly.

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In conclusion, while the myth of bright colors provoking shark attacks may persist, scientific research indicates that sharks primarily rely on contrast rather than specific hues. Understanding the limitations of shark vision can help dispel unnecessary fears and ultimately contribute to a safer and more informed outlook on sharing the waters with these majestic creatures.

References: – Insider: Why bright colors may not provoke shark attacks – University of Florida: International Shark File – Gavin Naylor: BBC Earth – Richard Robinson @ Getty Images

• eyes
• Shark Attacks
• Sharks