Animals With Blue, Green And Purple Blood

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29 September 2024

When we think of blood, the colour red typically comes to mind. In humans and many other animals, blood is red because of hemoglobin


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However, nature is full of surprises, and some animals have blood in hues of blue, green, and even purple


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Here's a list of animals with uniquely colored blood, including blue, green, and purple:


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Horseshoe Crab: Their blood is blue because it contains hemocyanin, which turns blue when it binds with oxygen


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Spiders: Certain spiders, like tarantulas, have blue blood due to the presence of hemocyanin


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Octopus: Like horseshoe crabs, octopuses also have blue blood thanks to hemocyanin.


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Scorpions: Their blood is blue for the same reason—hemocyanin.


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Green Sea Turtles: Their blood can appear green because of a high concentration of biliverdin.


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Prasinohaema Skinks: Species like Prasinohaema skinks have green blood due to elevated levels of biliverdin.


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Sea Cucumbers: Their blood can look purple due to the pigment hemerythrin, which turns purple when oxygenated


Image: Marine Stewardship Council

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