Do Lobsters Have Blood? -Is it Colored or Colorless?

Do lobsters have blood? Like every animal, lobsters have blood but it is not like human blood. Why can’t we see their blood? It’s because lobsters’ blood has no color. You will find a detailed explanation of lobster blood in this blog. So let’s dig into the blog!

Do Lobsters Have Blood? -Explained

Lobster has opaque colorless blood. That’s why there is no redness to lobster blood. As its oxygen content increases, its color changes to a deep blue.

Also See: How Long Do Lobsters Live? Secrets of Lobster Lifespan

The fact that lobsters have hearts and that nerves rather than muscles control their heartbeat will also surprise you. The blood of lobsters is named hemolymph. When people cook lobster, the blood turns milky-white and thick. You will find milky-white blood in the lobster dish. However, the blood is edible.

Like every animal, lobsters pump their blood through their hearts. The heart of a lobster is found on its back, between the tail and the brain. Lobsters ingest blood at the tail, where it is pumped to the heart and antennae.

The blood is pumped to the antennae with the help of pulsatory organs. A lobster’s blood is pushed from the heart with each heartbeat into the main arteries. The primary arteries supply blood to the ventral nervous system, the abdomen, and the sensory organs in the lobster’s head. Lobsters’ organs are enclosed in cavities called sinuses, where blood is emptied.

Can Lobsters Bleed?


Now that you know lobsters have blood, yes, lobsters can bleed. It is such a common question to ask whether a lobster can bleed. You wouldn’t see if a lobster could bleed because its blood is clear.

See also  Do Lobsters Mate for Life? Secrets of Lobsters Mating

Because lobsters can bleed, you can clearly see the milky white blood when it’s cooked. The blood is edible and safe for humans because it is already cooked. But if a lobster is alive and gets injured, can you see lobsters bleeding? Often, you can’t see lobster bleeding because their blood clots in a matter of minutes. 

Lobsters do not bleed like humans or other animals. First of all, the blood is transparent, which is difficult to see. Secondly, their blood vessels clot so quickly that they don’t lose blood. So it is difficult to see lobsters bleeding.

What Color Is Lobster Blood?

You are wrong if you think that lobsters’ blood is only transparent and stays transparent. You would be surprised to know that lobsters’ blood can turn blue. When the transparent white blood comes into contact with oxygen, it turns blue.

Prof Sulistiono from IPB University explained that when the lobster blood is oxygenated, it turns a blueish color. Lobster blood has hemocyanin, which contains copper.

Also See: How Do Lobsters Communicate? Secrets of Their Underwater Talk

Other vertebrates, like frogs, mammals, humans, birds, and fish, have hemoglobin, which makes the blood red. But lobsters have hemocyanin in their blood, which makes their blood blue when oxygenated.

You can tell a lobster is healthy and that its blood hasn’t come into contact with oxygen when it is clear. A protein in the blood of Crustaceae animals called hemocyanin carries oxygen. When hemocyanin comes in contact with blood, it gets a bluish color.


Besides that, lobsters don’t have any other color in their blood. Unlike humans, they don’t have red blood cells. In a storage tank or floating crate, a lobster’s blood would be blue since the oxygen levels in the water are high.

See also  Are There Lobsters in The Pacific Ocean?

Due to the high oxygen level, hemocyanin turns blue. After watching Blue Blood in Lobster, try not to freak out and assume it’s unhealthy or sick – every store-bought lobster will have blue blood, which is normal.


What is the red stuff in the lobster?

In the female lobster, you will see some red stuff named “coral.” They are also known as “Roe.” The red stuff in the lobster is tiny lobster eggs in female lobsters. Only female lobsters exhibit the red substance. It can be found along the tail and at the bottom of the body. Uncooked, the roe is black, but depending on the diet of the lobster, the color may change. Like caviar, lobster eggs used to be prized as a delicacy.

Which part of a lobster can you not eat?

The tail vein, shell, and cartilage are not edible parts of the lobster. That means you can not eat a lobster’s shell, cartilage, or tail vein. Some restaurants will serve you lobster with shells, claws, and tails for fanciness. However, you don’t have to eat them just because they are served to you.

What happens when a lobster is injured?

When a lobster is injured, it starts bleeding. But the bleeding stops after a few seconds because of the blood clot. Lobsters’ blood can clot in just a few seconds. For this reason, lobsters can survive even if they are badly injured.

If a lobster is injured, make sure to keep it out of water for a few minutes. It will make the blood clotting process more effective. Some people also throw lobster as soon as possible after V-notching. But you can keep it out of water for a few minutes if it is injured.

See also  How Many Legs Do Lobsters Have? (10 or 8) All about Legs & Claws


It is strange, but lobsters do have blood. Just because it is transparent does not mean lobsters do not have blood. Just like lobsters, other marine crustaceans have transparent blood. However, other fish have red blood like human beings.

4 thoughts on “Do Lobsters Have Blood? -Is it Colored or Colorless?”

Leave a Comment