Shrimp don’t use iron like us—they use copper to carry oxygen, giving their blood a brilliant blue glow! Scientists can even check their health by the blood’s color. <nis:link nis:type=tag nis:id=ShrimpFacts nis:value=ShrimpFacts nis:enabled=true nis:link/> <nis:link nis:type=tag nis:id=MarineBiology nis:value=MarineBiology nis:enabled=true nis:link/> <nis:link nis:type=tag nis:id=DidYouKnow nis:value=DidYouKnow nis:enabled=true nis:link/> <nis:link nis:type=tag nis:id=FunFactFishFridays nis:value=FunFactFishFridays nis:enabled=true nis:link/>