How to Tell If a Neon Tetra Is a Male or Female? 5 Different Ways

How to Tell If a Neon Tetra Is a Male or Female?

In the world of neon tetras, it can be difficult to tell the boys from the girls. But with a little bit of know-how, you can sex your neon tetras and ensure that you have a healthy and balanced aquarium. 

In this article, we’ll discuss the differences between male and female neon tetras, as well as how to identify each sex.

5 Differences to Sex Tetra Fish

1. Color

Tetras are simple to spot. These fish have blue or red stripes on their bodies.

The male’s color will be more brilliant and spectacular than the female’s.

Male neon tetra colors, like those of other animals, are more vibrant and iridescent to compete with other male tetras for female tetra attention.

2. Belly

Female tetra fish have a noticeable rounder and fuller belly than their male counterparts.

This is because female tetras carry and nurture eggs inside their bodies until they hatch. 

The eggs are attached to the females’ bodies via a sticky substance, and a larger belly is necessary to accommodate them. 

Males do not have this.

3. Body Shape

When viewed from the side, it is easy to see the difference in shape between male and female neon tetras.

The male is slender with a straighter blue line, while the female is rounder with a bent blue line. 

Some aquarists say that when viewed from above, the females look plumper.

However, the straightness of the line and the plumpness of the female might occasionally be due to the eggs she is carrying.

4. Length Of Fins

In general, the male neon tetra has longer fins than the female. 

This is thought to be an adaptation that allows the males to better compete for mates. 

In some cases, the difference in fin length can be quite dramatic.

There is some debate over why the male neon tetra has evolved longer fins. 

One theory is that the fins help the males to better maneuver to chase down females. 

Another possibility is that the fins act as a signal to females.

5. Egg Laying 

So, as we all know, female fish will lay eggs while males do not. 

The easiest way to tell for sure is to watch the fish and see if she ever lays eggs.

If you see eggs being deposited into the aquarium, then you know that you have a female on your hands.

Ornamental Neon Tetras

To keep up with the popular appeal of these fish, ornamental types of neon tetra have been developed.

They’re selectively bred for physical qualities that give them a unique appearance.

Though they’re still neon tetras, they may look quite different from what you’d expect.

It may be difficult to tell males and females apart using the suggestions above when it comes to ornamental neon tetras since they can appear somewhat distinct from genuine variants.

So, it’s possible that coloration or fin length no longer applies to selectively bred fish.

Identifying Gender in Ornamental Neon Tetras

It can be difficult to determine the gender of an Ornamental Neon Tetra, but there are a few methods that can be used.

One way to determine the gender of an Ornamental Neon Tetra is by looking at the shape of its body which is considered as the main factor to identify the gender in this fish.

Male Ornamental Neon Tetras have a more slender and thinner body shape than female Ornamental Neon Tetras which are more rounded and larger.

Some other ways cannot help you to identify it as the color of the fins.

Related Questions

Male vs Female Neon Tetras – Which Live Longer?

There is no specific answer for this question since the life span of your fish depends on a variety of factors, including water conditions, diet, and tank size.

However, in general, Both live around the same amount of time if they are taken care of properly.

Neon Tetra Male to Female Ratio

One of the most frequently asked questions about neon tetras is what the ratio of males to females should be in a tank.

The answer to this question is not a straightforward one, as many variables can affect it.

The scientific ratio is three males for every single female, but the actual ratio is closer to five males for every six females.

Last Words

Now that you know how to differentiate between a male and female neon tetra, you can start creating your own beautiful fish tanks!

Just be sure to keep an eye on your tetras’ behavior and watch for signs of egg-laying, in order to ensure that you have the right gender mix.

We hope you enjoyed this article.

If you have any questions or comments, please feel free to leave them in the comments section below!