Step 1 : Introduction to the question "What chemical element gives the blood of a lobster a bluish tint?"
While humans and many other species have red blood, due to the iron in their hemoglobin, other animals have different colored blood. The bluish tint of a lobster's blood is due to the presence of copper found in the blue haemocyanin molecule in their blood. Hemoglobin, an iron-containing protein found in the blood of other animals—including humans—serves the same oxygen-transporting function but turns blood red. Some animals, such as the sea cucumbers, even have yellow blood. What could make blood yellow? The yellow coloration is due to a high concentration of the yellow vanadium-based pigment, vanabin.
