When we talk about blood, our brain will immediately connect to the color red. The mention of the color red is also often followed by the word 'blood', which indicates the type of red is bright like blood. This is because we know that blood is red, whether it is human blood, the blood of our pet cats, or the blood of cows and goats.

However, in reality, the color of blood in the 'animal kingdom' is not just red. Not a few animals whose blood color is beyond our expectations, ranging from blue, green, purple, and even white. There are white blood cells in our body. But every time we peel off our skin what comes out is not white blood but still red. Are you curious about what animals have this colorful blood, consider the following:

* Animals with purple blood: pea worms and brachiopods

Peanut worms and brachiopods are two animals that have purple blood. As reported by AnimalHow, this purple color is due to a protein called hemerythrin —its function is to carry oxygen in the body. The protein also helps marine animals to fight infection and helps the worms to regenerate when parts of their bodies are broken off.

* Animals with blue blood: spiders, scorpions and horseshoe crabs

There are also animals whose blood is blue (not because they're of nobility, you know!), including spiders, scorpions, and horseshoe crabs. This blue color comes from the high hemocyanin content in the blood.

Hemocyanin is a protein protein containing copper atoms in the blood that bind to the same number of oxygen atoms.

* Animals with green blood: tobacco worms, lizards and leeches

The owner of this green blood is usually an animal belonging to the group of lizards and worms, such as tobacco worms, lizards, and leeches. This green color is due to a pigment called biliverdin. This is the same pigment that can make our skin turn green after being hit or hit by a blunt object.

Most of these green blooded animals eat plants. Although there seems to be a connection, he said there is no scientific evidence about this.

* Animals with yellow blood: beetles and sea cucumbers

In addition to those already mentioned above, there are also animals whose blood color is yellow, for example beetles and sea cucumbers. This yellow color is due to a metal called vanadium which is found in the protein vanabin. At this time, he said, scientists still cannot solve why there are animals with high concentrations of vanabin, because the content does not help oxygen circulation in their bodies, unlike the animals above.

* Animals with white blood: ocellated icefish and insects

Generally, these animals that have white or translucent blood live in the Antarctic region. The white color is caused because the blood does not contain the protein hemoglobin or hemocyanin at all. According to scientist Michael Oellermann of the Alfred Wegenar Polar Institute in Germany, cold water can hold more oxygen than warm water. And because water has enough dissolved oxygen, fish don't need to carry hemoglobin. They will automatically get oxygen from cold water.

Fish that live in ice water also don't have scales like other fish. Scientists say this allows it to absorb oxygen directly through the skin.

It turns out that there are also many unique species that live in this world. That's just what was discovered, maybe there are still many that have not been touched by humans.

Image from Google and Unplash.