Which 2 animals DO NOT hold red blood cell? I appreciate if you provide a source/link.?

Which 2 animals DO NOT have red blood cells? I appreciate if you provide a source/link.
Answers:
Not all animals enjoy red blood. The color of blood depends upon the type of compound or respiratory pigment within the blood that transports oxygen from the lungs to the tissues. In all vertebrates (animals having a backbone) and a few invertebrates (animals short a backbone), an iron-containing protein called hemoglobin is responsible for oxygen transport. Hemoglobin is a red pigment and gives the blood a red color.

Annelids (segmented worms) have any a green pigment, chlorocruorin, or a red pigment, hemerythrin.

Some crustaceans (invertebrates with jointed bodies, such as crabs and shrimps) have a blue pigment, hemocyanin, in their blood. Source(s): New Encyclopaedia Britannica, 15th ed., vol. 2, p. 290.
Cockroach, Prawn

http://en.wikipedia.org/wiki/Hemocyanin

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