Do Fish Drink Water? The Detailed Explanation! (2024)

Have you ever wondered if fish drink water? It’s an interesting query that has more to it than meets the eye. The short answer is, Yes! Fishes do drink water. In this blog, we’ll look into the curious details of how fish consume water and what varieties they can sip. So, let’s get right into it!

amazon store official logo for fishyfishpet
Shop Todays Best Pet Deals!
Enjoy huge savings, fast delivery, and high-quality products - Last Used 3 mins ago.
Enjoy huge savings, fast delivery, and high-quality products - Last Used 3 mins ago. Show Less


If you’ve ever stopped to admire a fish swimming in a tank or pond, you may have wondered – do fish drink water? It’s a simple question with a complex answer. In this blog article, we’ll explore the fascinating details of how fish drink water and the different types of water they can consume. So, let’s dive in!

Do Fish Drink Water?

Fish require water to stay alive, just like humans. Based on the habitat they live in, water enters a fish’s body through a process known as osmosis, where water diffuses across a membrane to maintain a balance. Freshwater fish never drink water since their bodies are saltier than the water around them. Through skin and gills, osmosis absorbs water into their bodies, which is the opposite of what happens with saltwater fish, where the water is taken out.

If freshwater fish did consume water, they would become like balloons. Saltwater fish have a different kidney function as the liquid around them is heavily laden with dissolved salts and minerals. This means that water within the fish is continuously being taken out of them into the surrounding water. To compensate for this water loss, fish from the ocean actually consume water through their mouths.

Do Fish Drink Water Fishyfishpet
Do Fish Drink Water Fishyfishpet

Do Salt Water Fish Drink Water?

Do Salt Water Fish Drink Water

Saltwater fish do take in water, but not similarly as people do. They absorb it through osmosis and actively drink it so that a portion passes through their digestive system. This is because their bodies are losing water as an effect of osmosis. Without drinking water, saltwater fish can become desiccated and even die. They have specialized cells that aid them in discharging the surplus salt from the water they imbibe. These cells help saltwater fish maintain an equilibrium between their bodies’ salt and water levels so they can exist in the sea.

Do Fresh Water Fish Drink Water?

Do Fresh Water Fish Drink Water Fishyfishpet

Unlike us, freshwater fish don’t need to take a sip of water as they take it in through their gills and body surface. This process is known as osmosis, which helps them absorb water without having to drink it. The thing is, these fish maintain higher salt levels in their body compared to the freshwater they live in. Therefore, the water flows into their body thanks to osmosis instead of exiting it. This helps them keep the balance between salt and water levels, allowing them to thrive in freshwater.

Do Fish Drink the Water Around Them?

Do Fish Drink the Water Around Them Fishyfishpet

Fish depend not only on the water around them for hydration; they are also capable of absorbing minimal amounts of humidity from the air. This is possible because of their capability to take in water molecules through their skin.

Do Fish Drink Salt Water?

Certain species of fish can consume saltwater, such as clownfish and angelfish. These types of fish can take in the salty water via their gills, filtering out the salt and expelling it from their bodies while retaining the moisture.

angelfish Fishyfishpet
Do Fish Drink Fresh Water. Fishyfihspet
Clown Fish Fishyfishpet
Do Fish Drink Fresh Water Betta Fish Fishyfishpet

Do Fish Drink Fresh Water?

Certain species of fish are equipped with the ability to consume freshwater. Goldfish and betta fish, for instance, can take in freshwater through their gills, filter out the oxygen and use it for respiration while holding the water.

Do Fish Drink Fresh Water. Fishyfihspet
Do Fish Drink Fresh Water. Fishyfihspet
Do Fish Drink Fresh Water Betta Fish Fishyfishpet
Do Fish Drink Fresh Water Betta Fish Fishyfishpet

Do Fishes Drink Their Tank Water?

Do Fishe Drink Their Tank Water Fishyfishpet (2)

Fishes indeed consume water from the tank they are in. This is because they are capable of absorbing small amounts of water molecules through their skin. Additionally, they can also drink small portions of water from their surroundings, like humidity in the air. Therefore, in an aquarium, they can draw in water molecules from the liquid around them.

How Do Fish Drink Water?

Fish cannot simply gulp water. They consume it through their gills. Marine creatures, like clownfish and angelfish, are able to drink salt water by extracting the salt from the liquid with their gills. On the other hand, freshwater fish, for example, goldfish and betta fish, can drink fresh water by taking it in through their gills and separating the oxygen from the water.


This blog post was meant to answer the question: do fish drink water? As it turns out, the answer is “yes.” But it’s a bit more complex than that. Fish take in water through their gills, unlike other animals. Moreover, some species can only consume fresh water, while others can drink salt water. If you would like to learn more about fishkeeping, please go to our website. You can find product reviews, top-ranking lists, how-tos, and other related articles there.


Do fish get thirsty in water?

The simple answer to this question is “no.” Fish don’t generally get thirsty when they’re in the water. That’s because they live in a very different environment than we do. Unlike us, fish don’t need to drink water to stay hydrated. That’s because the water they live in provides them with all the moisture they need to stay healthy. Fish absorb the water through their skin, which is why they can live in water with very low oxygen levels.
However, it’s important to note that fish may still become dehydrated if the water they’re living in becomes too hot, contains too much salt, or is polluted in some way. In these cases, the fish will have difficulty absorbing enough water to stay hydrated, and thirst could be a sign of dehydration.
So while fish don’t technically feel thirst when they’re in water, it’s still important to make sure the water they live in is healthy and not too hot or salty.

Do fish swallow water?

Yes, fish do swallow water! Depending on the species of fish, they may swallow water in a variety of ways. For example, some fish use their gills to filter water and then swallow it, while others use their mouths to suck in and swallow water.
Many species of fish also use their mouths to suck in small bits of food from the water, and this process can also involve the swallowing of small amounts of water. This is especially true for species that feed near the surface of the water, such as carp, catfish, and perch.
Some species of fish, such as sharks and rays, can actually take in large amounts of water when they suck in prey. This is because when they suck in prey, they also take in a large amount of water with it. This is known as “ram ventilation” and it helps the shark to get oxygen from the water.
Overall, while some species do swallow water more than others, all fish need at least some amount of water to survive. So the answer to the question: Do fish swallow water? is yes!

Do fish drink water or just breathe it?

The answer to this question is actually a bit more complicated than you might think! 
Yes, fish do drink water, but they drink it in a different way than we do. Fish extract oxygen from the water through their gills, so they don’t need to drink water the same way we do. Instead, fish absorb water through their skin and then excrete the excess, a process known as osmosis. 
At the same time, some fish species, such as the desert pupfish, can actually drink large amounts of water when it’s available. These fish use their mouths to suck up water and bring it into their body. So, while the majority of fish species don’t need to actively drink water to survive, some species are still able to do so when necessary. 
In addition to drinking water, fish also need to breathe it in order to extract oxygen. The gills absorb oxygen from the water and then transfer it into their bloodstream. Without oxygen in the water, fish would not be able to survive. 
So, while most fish don’t drink water the same way humans do, they still need it in order to survive!

Do fish constantly drink water?

Yes, fish constantly drink water. In fact, fish need to consume water in order to stay alive. Water intake is essential for their ability to regulate temperature, absorb and get rid of wastes, and stay hydrated.
Fish take in water through their gills and mouths. When they swim, they take in water from the surrounding environment and filter out the oxygen and nutrients they need. This process is called “osmoregulation”. The fish must constantly replace the water they use for this process, so they are always drinking water from their environment.
How much water a fish needs depends on the species. Some fish need more water than others, depending on their size, environment, and diet. Fish that live in saltwater need to drink more often than those that live in freshwater, as saltwater has a higher concentration of dissolved salts which can cause dehydration.

What happens when a fish drinks water?

When a fish drinks water, it’s actually doing something called “osmoregulation.” This is the process of regulating water balance in their body by taking in water and releasing salt. 
When fish drink water, it passes through their gills and is absorbed by their body tissues. As the water enters the fish’s cells, it creates a higher concentration of salt in the surrounding water. This causes an osmotic pressure that draws more water into the cells until the concentration of salt is balanced between the inside and outside of the fish’s body.
The fish also excretes excess salt through its gills and other organs. This helps it keep its body fluids in balance and maintain its health. It also helps the fish stay buoyant in the water.
So, when a fish drinks water, it helps them regulate the balance of salt and water in their bodies, which is essential for their survival.

Do fish drink water or absorb it?

The answer to your question is both! Fish can drink water and also absorb it. In fact, fish consume both liquid and solid forms of water. 
When it comes to drinking water, fish are able to take in water through their mouths and absorb it into their bodies. This is done by using their gills, which are filter-like structures that absorb oxygen from the water while also taking in water molecules. This process allows the fish to remain hydrated. 
When it comes to absorbing water, fish are able to take in water molecules through their skin. This absorption process is known as osmosis, which is a process where molecules move from an area with a higher concentration of molecules to an area with a lower concentration of molecules. This allows the fish to remain hydrated without having to drink water. 
So, in conclusion, fish can both drink water and absorb it. Both processes help them stay hydrated and healthy.

why do fish drink water

Fish are aquatic animals, meaning they live in water. But while they are surrounded by water, they don’t get all the nutrients they need from it. In order to survive, they need to drink fresh water to replace what they lose through osmosis.
Fish have a special organ called the “gill” which is responsible for extracting oxygen from the water. As a result of this process, some of the water is lost and needs to be replaced. So, in order for fish to stay healthy, they need to drink fresh water to replenish what was lost.
Additionally, the water in an aquatic environment is constantly changing due to evaporation, precipitation, and other natural processes. As a result, the fish need to drink fresh water in order to maintain the right balance of minerals and other nutrients in their bodies. 
Finally, fish need to drink water in order to regulate their body temperature. By drinking cool water, they can lower their body temperature and avoid overheating. 
So there you have it! Fish need to drink water in order to stay healthy, hydrated, and regulate their body temperature.

do fish drink water to live

Yes, fish do drink water to survive! It’s important for them to stay hydrated, as their bodies are made up of mostly water. The water they drink helps them regulate their body temperature and maintain their salt balance in the body. 
It’s also important to note that while fish do drink water, they don’t actually need to do it all the time like humans do. This is because they get some of their water intakes from their food. They also get some of it from the environment around them, such as from plants and other organisms that are living in the water. 
Overall, fish need to drink water to stay hydrated and keep their bodies functioning properly. It’s important to make sure your fish have access to clean, fresh water at all times in order for them to thrive!

which fish do not drink water

There are actually quite a few species of fish that don’t drink water. Some of these fish have evolved to live in environments where they don’t need to consume water, while others have adapted to absorb the moisture they need from their food. 
One example of a fish that doesn’t drink water is the desert pupfish. This species of fish lives in the deserts of the southwestern United States and northern Mexico, and is capable of surviving without drinking water for extended periods of time. They get the moisture they need from the food they eat and from the air around them. 
The eel-tailed catfish is another species of fish that doesn’t drink water. This species lives in the tropical regions of Australia, and gets its moisture from the food it eats and from the air around it. 
The mudskipper is a species of fish that also does not drink water. This species of fish lives in the brackish waters of mangrove swamps and coastal estuaries, and gets its moisture from the air and food it eats. 
Finally, there are some species of fish that live in water so salty that they don’t have to drink water at all. These fish get all their moisture from the saltwater they live in. Examples include the yellowfin goby, which lives in the Red Sea, as well as the African butterflyfish, which lives in the Indian Ocean. 

how do fish drink water in sea

It may seem strange to think about, but fish do indeed drink water, even when they are living in the sea. It’s a bit different from the way we humans drink water, but it’s a necessary part of their survival.
Fish don’t have the ability to suck up water like we do, so they can’t simply open their mouths and drink it in. Instead, they pass a current of water through their gills – the same organ that helps them breathe underwater. The gills take in oxygen from the water, and also absorb some of the saltwater. The cells in the gills then filter out the salt and pass freshwater into the fish’s body.
In addition to drinking the water directly, fish can also get some of the moisture they need from the food they eat. This is why it’s important for fish to get enough food to stay healthy – not only does it provide them with energy, but it also helps keep them hydrated.
So there you have it – that’s how fish drink water in the sea! It’s an important part of their survival, and it’s a process that’s quite different from how we humans drink water.

Arthur Brown

Senior Editor at

I’m a dedicated writer for FishyFishPet, an online resource aimed at helping fish pet owners of all levels understand how to care for their beloved underwater buddies. We offer something for everyone, whether you’re a beginner fish owner or a seasoned aquarist wanting to expand your knowledge. On our site, you can find an abundance of data on topics such as choosing the right species of fish and creating an awesome and successful tank environment. Thanks for visiting us – and we hope you found what you needed.

Leave a Comment