horseshoe

Most animals do have red blood, but there are exceptions. The red color in blood comes from hemoglobin, an iron-containing protein that binds oxygen. Some animals, like certain types of worms and mollusks, have different oxygen-carrying molecules in their blood, some marine
invertebrates have hemocyanin, which contains copper and gives their blood a blue color when oxygenated. Some animals may have green blood even clear blood due to different respiratory pigments.

Here are 10 Animals that don’t have Red Blood –

1. Octopuses have blue blood due to hemocyanin.
2. Horseshoe crabs have blue blood because of hemocyanin.
3. Squid have blue blood, hemocyanin.
4. Spiders have blue blood due to hemocyanin.
5. Scorpions have blue blood with hemocyanin.
6. Crayfish possess blue blood due to hemocyanin.
7. Lobsters have blue blood because of hemocyanin.
8. Brachiopods some have blood containing hemerythrin, giving it a violet or pink color.
9. Peanut worms have blood with hemerythrin, which can be pink or violet.
10. Leeches some have blood containing chlorocruorin, which can appear green.