Question

Which animal's blood is blue in color?

Answer 1

Blue-colored blood :

1. The blue color of blood is due to hemocyanin pigment.
2. Hemocyanin is an oxygen-carrying pigment like hemoglobin.
3. Hemocyanin pigment contains high copper levels in it.
4. Due to the copper content in this pigment, blood appears blue in color.
5. Examples of animals having blue blood are crustaceans, squid, and octopuses.
6. Crustaceans, squid, and octopuses have a blood color of blue.