3 Tips on How to recover from a betta fish from not eating

Originally posted on July 8, 2020 @ 12:47 pm

Last Updated on 4 months by admin

Can betta fish see in the dark?

curious betta fish poking around

Why Betta Fish Vision is Relatively Poor Due to Slow Iris Functionality

Betta fish is relatively poor for their iris functionality as the slow iris can be quite a hindrance to them.

Betta Fish is relatively poor because of slow iris functionality

Iris is an important part of the eye because it is where all of the vision in the body is. Without it, you cannot see clearly, and you will have blurred vision and problems with depth perception.

It is important organ for your fish to look after, as your eyes are what is going to give you the first indication that your fish is in distress or needs some sort of attention.

If the iris is not moving freely it is going to hinder its ability to properly see light and dark objects, so it is best to avoid having your fish suffer from poor iris functionality.

You should also make sure that your fish has not been stressed.

If your Betta fish is suffering from poor iris functionality, then there are a few things that you can do to help improve its appearance and functionality.

Firstly, you need to ensure that the water is clean and well maintained and you need to make sure that the temperatures of your fish tank is stable and balanced.

Make sure that you provide your fish with plenty of room as well, so that it has space to move around and to allow its fish eye to get some sunlight. This can mean that it will be able to see as much light as possible and will improve its overall appearance and functionality greatly.

Betta Fish Use Lateral Lines To See Underwater and Hunt Underwater For Food

Many people think that bettas will be unable to see through aquarium glass, and some even believe they will not be able to see underwater.

This is simply not true, however. The truth is, better use very fine vision to detect movement and prey, and they can also see light and sound underwater.

A few years ago, bettas were the first aquatic species to be shown to use lateral lines to see underwater and hunt for food.

Since then, the behavior of many other types of fish, including angelfish and clownfish have also been investigated.

betta fish use lateral lines to see

The lateral line has a strong sensitivity to color, but it can also detect dark underwater.

  • Bettas are capable of seeing in the dark underwater, and they use this ability to locate food.
  • One of the most common uses of this particular eye pattern is to detect movement.
  • When a betta is confronted with a moving object or a predator, he can respond by raising his tail, but if he senses nothing underneath the water’s surface, he will often raise his head, just like a human being would.

The second use for the lateral line in the wild is to orient the betta fish.

If you’re not familiar with lateral lines, then you should consider it the same way you think of magnetic signs on a compass.

Basically, a line on the compass points to the north pole and the south pole; with a lateral line, the fish’s body is pointing toward the direction it was looking when it was in the aquarium.

Many betta fish find themselves hiding under objects such as leaves, rocks, and logs, and they are most comfortable under these items during feeding time.

By observing this behavior, you can figure out what the fish needs to survive. When feeding, make sure to remove any objects from the tank which may obstruct your betta’s view of its food. Many bettas actually hide under objects and will only come out to feed when you give them food.

Some betta fish will even use their lateral lines to hunt for insects or worms, but these types of fish rarely get very far.

They need to see movement underneath the water to track down the prey, but even if a better finds one, it may not be able to catch it because of the substrate which is used to conceal the bait.

These fish tend to have very tiny teeth, so they need to see the prey up close in order to kill it.

Betta fish have a wide array of colors and patterns in their eyes, but the lateral lines in the fish’s eye are probably one of the easiest to recognize because they appear like horizontal barbs or hooks, pointing downward.

They look like horizontal barbs, but they aren’t, and instead, they are a series of small holes that line the eye. When a betta fish finds one, he uses the hole to hold the tip of his tail and then snatches the food out of the water with his mouth.

How Similar Is Betta Eyes to Terrestrial Vertebrates?

betta eyes are similar to terrestrial vertebrates but have rounded lens

It’s often said that better eyes are like terrestrial vertebrates but have a rounder lens, but they’re not.

A betta fish’s eye is like a small bird’s eye and its pupil is as round as the iris of a human or a bird.

The betta fish’s eyes are oval shaped, because they have very little water volume.

Because they have less water volume, the eyes are smaller than terrestrial vertebrates, but they still have a normal size. But because the eyes of the betta fish are round, they appear bigger and more prominent than the eyes of a cat.

The cat eyes are also round, but they have a regular iris which is a characteristic of vertebrates.

Another important difference between the eyes of the betta fish and the eyes of other fish is the position of the cornea.

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The cornea of the eye of a terrestrial vertebrate has a central hole and is surrounded by two hemispherical openings.

But the cornea of the betta fish has a central hole and it is surrounded by only one hemispherical opening.

The placement of the cornea in the eye of the betta fish is called trabecular system.

The cornea of the betta fish is also rounder in shape because it is positioned on the corneal surface.

The iris is situated at the front of the eye, and the pupil lies in the middle of the iris.

In terrestrial vertebrates, the iris is located in the center and the pupil lies at the back of the eye. The arrangement of the cornea in betta fish is similar to the configuration of a car’s headlights.

The eyes of the betta fish are very sensitive, so it’s important for your betta to be well-hydrated and properly hydrated.

You can do this by feeding the betta regularly with live food, especially live worms. and vegetables.

Different Types of Cone on the Retina of Your Betta Fish

betta fish retina contains sticks for monochrome vision

Betta fish retina contains many small, dark-colored bumps called “dots” that can be found in both males and females.

These are a very important part of the betta fish eye and are what give it its true color vision. The betta fish’s retina is actually composed of two different types of cells. In order to see in color the betta fish eye is made up of three types of cones.

The red and green cones in your betta fish’s retina are what help the fish to “see” light and color. These two cones are located in the top and bottom of the fish’s eyes and are named as ganglion cones. They are the main reason why the betta fish can see in color and not just black and white.

On the betta fish’s retina consist of three types of pigmentary cones. These are referred to as protofeathers, ganglion, and buphthalmos. Each of these cones has a very unique way of transmitting light and color to the fish. Because of this the fish can easily distinguish between light and color and their natural habitat.

In case you are wondering why the fish’s body produces light when exposed to red light, it’s to help it detect food quickly. The red light in this case can be very effective in helping the fish identify and chase down food. When the fish sees light that it associates with food, it is much easier to grab them.

The green cone is also important on the betta fish’s retina because it is the one responsible for transmitting the blue light from the sun. Blue light is used to make the fish sleep and rest well. Without blue light the fish may become lethargic.

To further explain color vision and how betta fish can distinguish between light and color there are three types of cones in the betta fish’s retina that have their own light sensitivity to colors. When they come into contact with the proper color the fish can quickly detect it and recognize the source.

It is important to note that the color cones on your fish’s retina contain a lot of photoreceptor cells that are responsible for color perception. The color cones on your fish’s retina can only process light in its primary colors.

The last type of cone in your betta fish’s retina contains dark pigments called melanin that helps the fish to distinguish between dark and light areas of its environment. This makes the fish’s color vision very good to use when it comes to detecting the different colors of your tank and fish.

The three types of cones on your betta fish’s retina play an important role in your fish’s vision. They make sure that your fish can easily see light and color, while at the same time helping them differentiate between dark and light areas in their environment.

What Exactly is the Retina in Your Betta Fish?

The retina is the part of a betta fish that contains cones for color vision. The cone cells are responsible for producing the colors that we see, such as red, orange and yellow. The other cone cell types produce other colors, but they are generally less apparent than those produced by cones.

betta fish retina contains cones for color vision

The retina, which is shaped like a football, is in the middle of the eye. The retina is responsible for receiving and sending images to the brain, and because it is the center of vision in most fish, you can guess that there are a lot of images sent to it.

When your brain receives and interprets images that are transmitted from the retina, it creates a picture, and those images are called neurons. When these neurons receive more images, they grow bigger, creating new neurons that send more messages to your brain.

All of the neurons in your eye communicate with each other by sending signals through the optic nerve, which is a network of nerves that connects all of the retinal cells. If you have two or more different colors that are being transmitted from one neuron to the next, that signal is interpreted by the brain, creating a picture.

The cones in the fish retina contain cones that are designed for color vision. A single cone is responsible for sending signals from one neuron to the next. The cone is responsible for generating the colors that we see.

In conclusion, the betta fish retina contains cones for color vision, and they play an important role in the way that information is processed by the brain.

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How Betta Fish Sees Underwater Using Sensory Organs

The question of how best fish can see in the dark is actually one of a few unanswered questions.

The betta fish have sensory organs that enables them to see even if there is no light, even though there is not any light at all.

This ability to see in the dark makes them very important as pets.

Some bettas live in aquariums with fluorescent lighting so that they can be easily spotted when it is night time, but for them, the best place to hide is in a place which has no light at all.

They still have eyes which are capable of seeing in the dark, but they will not work in the dark in order to see at night.

A lot of people will ask, “what do betta fish have sensory organs for?” There are actually three parts to a fish’s sensory system. The first two parts are the sensory organ and the second part is the olfactory system.

The olfactory organ of a betta fish is much smaller than the other two organs.

It is much easier to identify a betta fish if you look at the olfactory organ.

The nervous system in your fish is what allows it to detect changes in their environment.

This is why a betta fish will have the most trouble if it is constantly exposed to a certain type of environment.

If the environment change is the absence of another fish, it will become stressed and begin to fight back. The fight will then result in the loss of the fish and the stress of the stressed fish will cause the olfactory organ to malfunction.

Betta fish has a second part of their sensory organ that is very sensitive to the temperature in the tank.

If the temperature of the tank is a lot lower than normal, your fish will begin to panic and fight even harder to get out of the tank.

A good rule of thumb is to try and keep the tank temperature between sixty-five and seventy-five degrees.

The last part of your fish’s sensory organ is called the olfactory organ. This is where your betta fish will use its nose to find food and other creatures. It has a very sensitive smell that will attract food like a magnet. If the smell is too strong then it will cause stress in your betta fish.


The betta fish, or the Siamese fighting fish, are very popular pet fish sold in ornamental fish bowls. First discovered in Southeast Asia, they used to live in rice paddies and warm flood plains of the region.

They adapted to the harsh climate in the region, due to the frequent storms and drought cycles, making them a very versatile fish. Part of their main charm is their gracefulness and multicoloured hues. As innocuous as they might look, though, these fish are highly territorial, and placing these fish together will result in a fight.

History of betta fish:

Having its origins in Thailand, Laos, Vietnam and Cambodia, the betta fish are named after an ancient Asian warrior clan, called Bettah. Their popularity as a pet began around 150 years ago, when Thai children used to collect these fish and place them in the same pool to watch them fight. This gave them the name Siamese Fighting Fish (Thailand was then called Siam).

The popularity of this sport rose to such extents that the Thai King regulated and taxed them. Their scientific name, Betta Splendens, literally translates to beautiful warriors, and these majestic, strikingly colored, long-finned fish do complete justice to that title.

How to take care of betta fish:

The betta fish has an ability typical of labyrinth fish: it can breathe oxygen directly from the air and also take in oxygen through its gills.

This means that the betta fish can spend a short amount of time outside the water breathing in oxygen around them if needed.

Since they live in rice paddies with shallow, stagnant water, or slow moving streams, they are used to warm water temperatures.

If you?re planning to buy betta fish, ensure that their aquariums are cleaned regularly, water temperature is maintained between 76 to 82F and plants are placed inside the aquarium.

Take care that the plants should be inside the aquarium and not placed near the surface of the aquarium, since the fish take in oxygen from the surface of the water, which can instead get used up by the plants.

These fish seem to enjoy having decorations in their living space, so adding a few ornamental rocks and decorations might be a good idea. This provides them with hiding places which make them feel safe.

Betta fish should be kept in aquariums of at least a capacity of 2.5 gallons per fish. They are also omnivorous; in the wild, they mainly subsist on insect larvae and insects.

Plant roots are not a sufficient dietary source for these fish. As an alternative, you can feed them protein based flake foods, which are easily available in pet stores, for their sustenance.

Betta fish have a tendency to jump out of the aquarium to search for larger bodies of water, so it is useful to have a lid on the aquarium, with enough perforations to allow for sufficient oxygen in the tank.

Lifespan of a betta fish:

The Siamese fighting fish can live for around 3 to 5 years.

Behaviour of Betta fish:

Betta fishes are normally pretty active and playful during the daytime. They need day-night cycles; their bodily functions and natural processes are disturbed if they are kept in dark rooms for eight to ten hours, which in turn affects their health.

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When in a well-lit environment, they can easily see and swim in the aquarium. In fact, they can even recognize their humans and follow your finger around the aquarium. However, keeping them in well-lit environments for too long can also have an adverse effect them, since they utilize the nighttime to sleep, relax their muscles and restore energy.

Can betta fish see in the dark?

Betta fish have a weak vision in the darkness.

But the very weak lighted room conditions the betta fish can still see in the dark and see the video that my betta fish is following my finger in low lighting conditions.

They have what is called monocular vision- that is, they can see in two different directions at the same time; however, this comes at the cost of their depth perception.

Their low vision is due to the slow functionality of their iris, meaning they take time to adjust to changes in brightness. Due to this, they do not rely solely on the vision to help them move around.

They have lateral lines on their sides, with small holes to help measure water pressure. Since water pressure is slightly different around objects (for example, a pressure wave is created when food or other objects are dropped in the tank), and increases the deeper they go, betta fish are able to navigate with a combined sense of vision and sensory organs.

Interestingly, bettas do have color vision, even if their range of colors is limited. They possess the ability to perceive lights of different wavelengths, and this is an attribute based on the living habitats of the fish. Color vision in fishes is found in a full-light environment (that is near the surface of the water), since the wavelengths that can pass through water to reach depths are limited.

Frequently Asked Questions:

Betta Fish Vision:

1. So can betta fish see in the dark?

Not very well; they need the combined powers of their weak vision and sensory organs to navigate in darkness. Indeed, it is rare for them to want to navigate in darkness; they prefer to rest themselves at night.

2. Is it alright to keep the fish in a naturally lit area of the house?

Yes, that would be the best spot to place your aquarium. The fish would greatly benefit from the natural day-night cycles available.

3. My aquarium is in a dimly lit space of the house; how can I provide sufficient light?

You can consider using artificial lighting to simulate daytime conditions for the fish.

4. How many hours should I keep the aquarium lit?

It is recommended to gradually dim the light before switching it off if possible, as a close approximation of natural light; however, the fish should not be kept in complete darkness for more than 8-10 hours.

Betta fish care:

5. Is it okay to keep two bettas in the same aquarium?

No, if they happen to be male bettas, they?d fight to the death. Male bettas are extremely aggressive.

6. Is it okay to keep a betta with other fishes in the aquarium?

Yes .

7. What kind of food should I feed my betta?

Many pet stores sell special betta food. Alternatively, a good diet would also be frozen or dried bloodworm and brine shrimp. The betta food is still recommended, due to the additional vitamins and minerals added to the food. Take care not to overfeed the fish to avoid lethargy.


While bettas are an excellent choice for pets, they need to be properly taken care of.

Their requirements include a heated aquarium, well-lit environments, and filtered, clean water. Betta behaviours are fascinating to observe for fish lovers, and while some aspects of their behaviour, in regard to their mating behaviour or swimming habits, have not been covered in this article, their basic tendencies for activity and rest have been discussed. Since bettas need regular light cycles, it is necessary to allow the fish to rest in darkness at night.

However, suddenly placing them in a dark environment during their day cycle could cause some panic and discomfort in the fish. While the fish have poor vision in the darkness, they can still use their vision in conjunction with their pressure sensitive body lines to navigate to a safe place in the aquarium.


https://www.petsit.com/facts-about-betta-fish https://www.aqueon.com/articles/origin-of-betta-fish-and-facts https://www.peta.org/issues/animal-companion-issues/cruel-practices/betta-fish/ https://www.bettabuzz.com/can-betta-fish-see-in-the-dark/ https://www.buyfishingguide.com/can-betta-fish-see-in-the-dark/