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What Animals Have Yellow Blood and Why Is the Blood Yellow?

April 26, 2017blood horseshoe crabs sea cucumber Yellow

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What Animals Have Yellow Blood and Why Is the Blood Yellow?

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What Animals Have Yellow Blood and Why Is the Blood Yellow? Friday October 16, 2009 #spacer{clear:left}#abc #sidebar{margin-top:1.5em}zSB(3,3)The other day I posted some edible fake blood recipes for Halloween, including a recipe that could be used to make any color blood that you like. I mentioned spiders (as well as horseshoe crabs and certain other arthropods) have blue blood due to the presence of copper-based hemocyanin in their blood. Many other animals, including humans, have red blood because that is the color of the iron-based hemoglobin. Red and blue are not the only colors of blood. For example, sea cucumbers have yellow blood. The yellow coloration is due to a high concentration of the yellow vanadium-based pigment, vanabin. Unlike hemoglobin and hemocyanin, vanabin does not seem to be involved in oxygen transport. In ad