s have blue blood
, too - literally. Oxygen
is carried in their blood by a chemical called hemocyanin,
similar to the familiar hemoglobin
that reddens the blood of vertebrate
s but containing copper
instead of iron
The best-known example of a blue-blooded animal is the lobster, which is often consumed by aristocratic "blue blooded" humans, giving a bit of credence to the adage "you are what you eat." Others include the horseshoe crab, crayfish, scorpion, octopus, squid, clam and mussel.