Do Lobsters Pee Out of Their Eyes?

Do lobsters pee out of their eyes? Well, lobsters have urine-release nozzles located right under their eyes, and they use this area to pee. So it’s not like they pee out of their eyes but from the facial area.

Interestingly, they communicate by urinating in each other’s faces, whether during a fight or when mating. In this article, I will discuss in detail the urinating habits of lobsters.

Do Lobsters Have a Urine?

Yes, lobsters do have urine. Their urine plays a crucial role in communication and social behavior, which will be discussed later on.

Lobsters use their urine to release pheromones, which are chemical signals that can affect the behavior of other lobsters.


The bladder of a lobster is situated beneath its brain, and the urine is stored and filtered here. The pheromones are then added to the urine before they are released through nephropores at the base of the antennae. These are the source of the distinct smell that is often associated with lobsters.

One interesting fact is that the urine stream from a lobster can travel up to seven feet away from the animal. This allows the pheromones to be disseminated over a wide area, making detecting them easier for other lobsters.

The use of pheromones in communication is not unique to lobsters. Many other animals, including insects and mammals, also use pheromones to signal information to their peers. However, the lobster’s use of urine as a carrier for pheromones is relatively uncommon and makes them stand out amongst other animals.

How Do Lobsters Pee?

Lobsters pee through openings at the base of their second antennae, nephrophores. These openings lead to the green glands, which are the excretory organs responsible for filtering waste from the lobster’s bloodstream.

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The green glands consist of a sac linked to a bladder by a coiled tube. The sac filters the waste from the bloodstream, while the bladder stores it until it is ready to be expelled.

Once the waste has been filtered and collected in the bladder, the lobster can release it through urine-release nozzles located right under their eyes. These nozzles allow the waste to exit the lobster’s body in a controlled manner.

Interestingly, the lobster’s waste is not just urine but also fecal matter. This is because lobsters excrete waste through a single opening known as the anus. So, when a lobster urinates, it is actually releasing a mixture of urine and fecal matter.

What Color Is Lobster Pee?

You already know that lobsters pee from their antennal glands near the antennae, under the eyes. The urine is described as greenish-brown in color and can be spotted as two pieces of snot. This description may not be the most pleasant to imagine, but it accurately depicts what lobster pee looks like.

Interestingly, the color of lobster urine can actually vary depending on the species and their diet. For example, lobsters that primarily feed on crustaceans, like crabs and shrimp, tend to have darker urine due to the higher levels of waste products in their excretions.


On the other hand, lobsters that mainly consume sea snails and clams will have lighter urine since their diet is mostly comprised of calcium-based shells.

The urine of lobsters is essential for maintaining their internal environment by eliminating waste products produced by metabolism. It aids in maintaining balance in their salt and water levels, thereby promoting their overall health and survival, similar to humans.

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Where Does a Lobster Pee Out? [Detail Explanation]

Lobsters have a unique way of excreting waste – peeking through openings at the base of their second antennae, which are called nephrophores. These antennae play a crucial role in the lobster’s urinary system, as they serve as the main outlet for waste removal.

The urine is produced by antennal glands, which are located near the antennae. These glands filter waste products from the lobster’s blood, including excess salt and other metabolic wastes. After the waste products have been filtered out, they are transported to the nephrophores through a series of ducts and tubes.

Interestingly, the urine-release nozzles of lobsters are located directly under their eyes. Lobsters use this area to pee, and the urine is expelled through these nozzles. This unique anatomical feature has puzzled scientists for years, as it is not yet fully understood why lobsters expel urine through their faces.

What Do Lobsters Do Through Urination?

Lobsters are fascinating creatures that have intricate social hierarchies and communication methods, one of which involves urination. Lobsters communicate with one another through urination, establish dominance, and express themselves to the group.

lobster communicate

Here is more detail into the functions and significance of lobster urination.

Waste Elimination

Like all animals, lobsters produce waste through metabolism that needs to be eliminated from their bodies. Urination is one of the ways lobsters get rid of this waste.

It is crucial to their internal environment as it maintains balance in their salt and water levels, promoting overall health and survival.

Social Behavior

Urination also plays a vital role in the social behavior of lobsters. For example, in a battle for dominance, lobsters will often spray urine on each other’s faces as a display of power.

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The dominant lobster will typically urinate more frequently and assertively than the subordinate one. This behavior is essential in establishing and maintaining their social hierarchy, which can determine access to food, resources, and mates.

Expressing Emotions

Lobsters can also use urine to express their emotions. For instance, when a female lobster is ready to mate, she will release pheromones in her urine to signal her availability to potential mates. This urine scent can attract male lobsters from a distance and trigger their mating behavior.

Moreover, lobsters communicate different emotional states through their urine. For example, when lobsters are angry or threatened, they excrete fouler-smelling urine, while more relaxed lobsters produce a milder scent.


Hopefully, you have a compact knowledge of urination in lobsters by now. Lobsters pee through nephrophores located under the eyes – at their antennae, and the color of their urine can depend on their diet.

Urination plays an essential role in the life of a lobster as it helps them to eliminate waste, maintain social hierarchies, and express emotions. It also serves as a communication tool between lobsters and other animals in the marine environment.

Without urine, lobsters could not survive in their natural habitat and interact with other creatures. If you have any further queries, reach out via your comment.

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