Many sea creatures living on the coral reefs adopt a very effective camouflage strategy. Believe it or not, they utilize the colors in the warm range – bright oranges and reds to protect themselves from predators. How could orange be a camouflage color, you might ask? Well, ocean water absorbs light – the greater the depth the darker it gets in general, but the water also absorbs wavelengths of light in a specific way. Longer wavelengths are absorbed first and on the light spectrum, those wavelengths produce the colors of light. From longest to shortest in our visible light range we see red, orange, yellow, green, blue and finally purple. So at a depth of 15 feet, reds disappear, and our color for this week’s challenge, orange, disappears at 25 feet!
Our fishy friends have evolved to display brilliant colors that literally blend with their environment – the water! This strategy helps to protect them from larger predators including Mr. Shark! Here are just three wonderfully orange creatures from my underwater adventures. Oh, and by the way, most divers carry an underwater light with them (mine’s on my camera frame) so they can see these spectacular colors in the muted ocean waters even during daytime dives.
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Wow, what an adventure, and be able to capture these beautiful underwater creatures! Thank you for the special post, Cathy!
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Thanks so much, Amy. It is very interesting how the water acts as a camouflage for these guys. That’s why a strobe is so important in photographing them!
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Fascinating to think how nature evolves to protect itself. Insightful post. Thank you.
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It is fascinating isn’t it? Glad you enjoyed the post, Carrie!
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Amazing!
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Thanks, Lorraine. Good to see you!
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That was enlightening (pun intended) Sea Creature Whisperer.
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Thanks, V.! Glad you enjoyed it!
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You continue to educate and enlighten us, Cathy. Your adventures are fantastic as are your photographs
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Thanks so much, Audra. It’s an amazing world, isn’t it?
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Indeed. And you help diversify mine.
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Fascinating … besides the images, love the factoid that orange is depth sensitive.
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Thanks, Frank. Actually all the colors are depth sensitive. The longer the wavelength of light, the sooner that color is absorbed, but eventually, even purple is absorbed!
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So beautiful and I had no idea that orange disappeared at 25 feet. Nature never ceases to amaze. My favorite is that little seahorse. You’ll have to capture the elusive mermaid at some point, C. ;).
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Those mermaids are really shy, Brigitte. And they move FAST! 🙂
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Awesome photos and beautiful creatures, Cathy! I’ve learned something new today, as I often do from your posts.
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Thanks, Leon. I’m so glad you enjoyed the post. Color absorption is one of the many challenges of underwater photography. Strobes help, but it’s also necessary to get as close to the subject as possible – while paying attention to all the other things required to scuba dive safely! But it’s a really fun challenge nonetheless.
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Love your pictures, and love learning from you as well. Didn’t know the explanation for the colors till now. And it makes so much sense. This way they can differentiate among themselves up close, and also remain less visible from afar. Thanks, Cathy.
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Exactly, Shimon! It’s a very interesting form of protection. Thanks so much for the comment!
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