Betta Fish Fin Curling – Symtomps And Treatments

Betta fish are frequently offered in pet stores, cheap superstores, florists, and even online. Betta fish are beautiful, especially the males with their long, wavy, and vibrant fins.

What if your betta’s fins started to curl up all of a sudden? Is your fish ill? In this article, we will provide a detailed explanation for this cause, make sure to read till the end.

Causes, Symptoms Of Fin Curling & Treatments

Since there isn’t a single treatment option that will repair all fin curl issues, you should utilize this guide to identify the root of the problem.

fin curling

Too Warm Water

The curling of the fins is significantly influenced by water temperature. If the water temperature is continuously too high or too low for a betta fish, its fins may curl up. Betta fish like a temperature range of 78–82° Fahrenheit, or 26–28° Celsius.

Genetic Disparities

A genetic abnormality in certain betta fish causes curling. A genetic aberration in bettas cannot be fixed, just like the aging factor.

The fry your bettas eventually produce would exhibit this deformity if they were born with curled fins. In such circumstances, your only choice is to get rid of the offending betta fish.

You should refrain from reproducing that specific betta fish if you have any suspicions that this is your situation. A similar problem will probably affect the following generation.

Buying young bettas that have been swimming with curled relatives is another thing you should avoid doing. These have a higher likelihood of later developing symptoms.

Genetic Disparities

Stress And Trauma

Betta fish are also living things, just like humans, and they experience anxiety just like humans do occasionally in their lives. If your Betta suddenly exhibits fin curling, it may be a sign that they are scared or attempting to defend itself.

Lethargy and sluggish mobility are two further indicators of nervousness. You should likely update if your betta tank is smaller than five gallons. If the tank size is not the issue, think about your nutrition. Make sure your bettas get a lot of protein-rich food


Constant battling can result in stress, infections, and fin curling, among other significant issues. Injuries are inevitable since betta fish, especially males, are inherently aggressive.

Male bettas are territorial, thus fights may break out in the aquarium and harm the fins.

There is no assurance that a betta’s damaged fins will recover and return to their normal condition. If your fish is in excellent health and the water quality is acceptable, you may probably attribute any observed curled fins to wounds.

However, some wounds will heal on their own. Because of this, prevention is the major mode of therapy in this situation.

Be cautious to rule out any possible reasons for the bruise. Consider separating your betta and any other fish that is housed in the same aquarium. Additionally, if your tank has any pointy objects or decorations, remove them.

Poor Water

The betta fish’s fins will probably curl up if the water has a lot of ammonia in it. You must regularly check your water in order to prevent this from happening.

For example, you require a temperature between 76 and 81 degrees Fahrenheit, a pH between 6.5 and 7.5, and no ammonia.

Nitrites and ammonia are extremely harmful to fish, as has already been mentioned. Fin curling is only one of several symptoms that will start to appear as soon as the level of these chemicals rises.

In the end, your betta can become ill or perhaps pass away. A water cycle is also required for ammonia. Additionally, you must remove any elements from the tank that cause ammonia levels to rise, such as decaying food and dead plants.

To avoid the situation being so bad that your betta’s fins start to curl, you must keep a watch on the variables in your tank. To make sure all the parameters are within the right range, test the water every week.

Combating The Current

Your pet fish may soon become stressed out and have curled fins if forced to swim against strong currents. Reduce the flow rate of the filter in your tank for an immediate fix.


Bettas typically live for 2-4 years and as they become older, they tend to lose color and develop some little roughness on the margins of their fins.

There may be some curling, but this is very natural. A betta fish may live up to 10 years if you give it the right care. A betta fish deteriorates much like every other living thing.

Fin Curling And Betta Clamped Fins – What Is The Connection?

Clamped fins in betta fish frequently result in fin curling. Betta fish with clumped fins simply have tight, clumped fins as opposed to loose, flowing fins. Stress is frequently the cause of your betta’s fins being clamped together.


Why Do The Fins On My Betta Fish Seem Strange?

Betta fins come in a variety of shapes and colors because of selective breeding. One kind, the crowntail, can have a fin-like appearance.

However, it is how a crowntail’s fins should appear. Beyond the edge of the fins’ edges are the points of the rays of the fins. The fish will always have this appearance on a crowntail; it won’t change overnight.

Fins On My Betta Fish Seem Strange

Why Are The Fins On My Betta Fish Drooping?

If you mean a male betta, then their fins are always droopy because they are long and flowing and were made to display for females and to show off to rival males who intrude on their territory.

Males flare their gills and stiffen up their fins to make themselves look very big and aggressive to ward off the invader.

However, if the fish has small fins and is a female, droopy fins aren’t a good indication since they might indicate a neurological disorder that prevents the fish from retaining its fins correctly or a condition with the fins like fin rot or a torn muscle at the base of the fin.

Are Betta’s Fins Curling Up As A Result Of Fin Rot?

Your betta’s fins curling up might be due to fin rot, which is easiest to identify by physically examining the margins of your betta’s fin.

Inspect the item for indications of jagged or uneven edges, color loss, or a milky white and soft feel. These symptoms point to fin rot in your betta.


Due to environmental variables including stress and unsuitable water conditions, betta fish’s fins may seem curled and clamped.

You must make sure that the parameters (pH, ammonia, nitrates, etc.) are within the appropriate range in order to address that problem.