Octopuses, lobsters, and horseshoe crabs use hemocyanin, which has copper instead of iron, and is blue instead of red—that's why these creatures bleed blue. Other related molecules are responsible for the violet blood of some marine worms, and the green blood of leeches.
Some animals like spiders and other arthropods such as horseshoe crabs, octopi, snails and lobsters, have blue blood due to the presence of copper-based hemocyanin. Sea cucumbers have yellow blood due to a high concentration of a yellow vanadium-based pigment called vanabin.
Octopuses have a copper-based blood called hemocyanin that can absorb all colors except blue, which it reflects, hence making the octopus' blood appear blue.
In Animal Kingdom, Blood Comes in a Rainbow of Colors. The Antarctic octopus, pictured, has a copper-rich protein in its blood that turns the vital fluid blue. Please be respectful of copyright.
Peanut worms, duck leeches, and bristle worms, all of which live in the ocean, use the protein hemerythrin to carry oxygen in the blood. Without oxygen, their blood is clear in color. When it carries oxygen, it turns purple.
One group of segmented marine worms has pink blood. This is because the molecule that carries the oxygen is a type of blood pigment, known as hemerythrin, which is described as pink or purple. A few species of segmented worms don't have any oxygen-carrying molecules at all, so their blood is colourless.
Vertebrates, including mammals, birds, amphibians, reptiles and fish also have red blood because they too use hemoglobin as an oxygen transport protein.
The icefish of the Channichthyidae family are unusual in several ways—they lack scales and have transparent bones, for example—but what stands out most is their so-called white blood, which is unique among vertebrates.
Snails, spiders and octopi have something in common- they all have blue blood! We're not talking in the sense of royalty, these creatures literally have blue blood. So why is their blood blue and ours red? One of the purposes of blood is to carry oxygen around the body.
Family Channichthyidae has fishes that do not contain hemoglobin pigment in their blood. Hence their blood is white. As Hemoglobin is important for carrying oxygen in the body, but in the habitat of these fishes, the amount of oxygen present in cold water makes them devoid of Hemoglobin.
Animals that don't rely on hemoglobin for oxygen transport don't have red blood because they don't have hemoglobin in their blood. Take squid, octopuses and some kinds of crustaceans, such as horseshoe crabs.
The 'immortal' jellyfish, Turritopsis dohrnii
To date, there's only one species that has been called 'biologically immortal': the jellyfish Turritopsis dohrnii. These small, transparent animals hang out in oceans around the world and can turn back time by reverting to an earlier stage of their life cycle.
Flatworms, nematodes, and cnidarians (jellyfish, sea anemones, and corals) do not have a circulatory system and thus do not have blood. Their body cavity has no lining or fluid within it.
Snails have more teeth than any animal.
This is TRUE. A snail's mouth is no larger than the head of a pin, but can have over 25,000 teeth (but these aren't like regular teeth, they are on its tongue).
Dogs, cats, small rodents, horses, and primates all lick wounds. Saliva contains tissue factor which promotes the blood clotting mechanism.
All mammals and birds are capable of generating this internal heat and are classed as homoiotherms (ho-MOY-ah-therms), or warm-blooded animals.
The colors of arterial and venous blood are different. Oxygenated (arterial) blood is bright red, while dexoygenated (venous) blood is dark reddish-purple.
The circulatory system in cockroaches is open type. The colour of the blood of the cockroach is not red it is colourless due to the absence of hemoglobin. The blood of the cockroach is known as hemolymph.
The short answer is ants have something similar to blood, but scientists call it “haemolymph”. It is yellowish or greenish. In vertebrates (animals with backbones such as humans, cats, dogs, snakes, birds and frogs) blood's main job is to move important things around the body.
Did anyone know that some animals have blue blood, especially when it is exposed to oxygen? Can you guess what animals might have blue blood? Lobsters, crabs, pillbugs, shrimp, octopus, crayfish, scallops, barnacles, snails, small worms (except earthworms), clams, squid, slugs, mussels, horseshoe crabs, most spiders.
Octopuses and horseshoe crabs have blue blood because the protein transporting oxygen in their blood, hemocyanin, contains copper, instead of iron, making their blood appear blue rather than red.
BATON ROUGE – Green blood is one of the most unusual characteristics in the animal kingdom, but it's the hallmark of a group of lizards in New Guinea. Prasinohaema are green-blooded skinks, or a type of lizard.
The adult blood python grows up to a size of eight feet in length. It can be heavy because of its muscular build. Females tend to be longer. The blood-red colors are the result of its scales.
But for most vertebrates—a group that encompasses all animals with a backbone, such as mammals, fish, birds, reptiles and amphibians—their blood runs red due to the hemoglobin used to transport oxygen.