Do Guppies Have Teeth? Will Guppies Bite?

A common variety of fish kept as pets is the guppies. These creatures are usually little, yet people find them intriguing because of their vividly colorful fins.

However, some believe that this species may be aggressive. Do guppies have teeth? The short answer is yes! But do guppy bites hurt?

Let’s delve into this post to get detailed explanations!

Do Guppies Have Teeth?

This species has teeth. Some only have tiny ridges on the tooth surfaces, whereas other varieties may develop sharp, pointy teeth.

This species develops teeth on both the upper and bottom of its jaws. Additionally, its tongue is inside the mouth.

The muscular structure of the tongue is different from that of the human tongue, nevertheless.

An opening on the floor of the mouth of a guppy creates its tongue instead.

Pharyngeal teeth, tiny developments of calcified tissues near the backside of the mouth cavities, are the most common teeth seen in these creatures.

These teeth do not require much force to smash food, although it’s their primary function.

Do they bite humans? It’s still a controversial question. Some assert that these fish bite people, whereas others dispute this.

These creatures are more intelligent than people assume. They can recognize their owners despite having little ability to express it.

As a result, if they see you dipping your hand into their aquarium, they can try to munch your fingers to introduce themselves and interact with you.

Therefore, if your pets do it, consider it a way of showing affection.

Will these creatures bite their tank mates? They are fish from tropical regions, and they mostly eat tiny invertebrates.

Most of the time, these creatures only use their teeth to bite other species when they feel threatened or when they are protecting their territories.

If your pets constantly attack other species in a community tank, moving them to another aquarium is best.

Do guppies eat each other’s tails? The bad news is yes!

When you add a new variety or don’t give them enough food, they may fight and eat each other’s tails or fins.

single guppy

Are Guppies Dangerous?

These creatures aren’t famous for being aggressive species. Most of their bites are not regarded as dangerous.

In general, they are not threatening. When under assault, these creatures may be exceedingly timid and meek.

Your pets are at least as hostile to other species as those other fish. They only kill tiny creatures like shrimp or ducklings.

It is crucial to remember that their shyness is frequently not constant and may be affected by various factors.

As a result, it’s better to watch out for your pets’ behaviors, even when you keep them for a long time.

Why Do Guppies Bite And Not Eat Their Food?

There are many reasons why your pets bite other tank mates or spit out their food. Let’s check it out!


The species can begin to fight for food with their tank mates or nibble them if you don’t give them enough food.

If you don’t know what to feed your pets, let’s click on this video to get more recommendations:


Stress is among the leading causes for a guppy to start biting other species. When confronted with stressful situations, guppies become aggressive.

Some stressful circumstances for this species may include not getting enough exercise, dwelling in poor water conditions, and experiencing repeated bullying from hostile tank mates.

These fish tend to bite and battle among themselves when these circumstances exist.

Territorial Reasons

Among the most common reasons why guppy bites occur is territoriality.

These creatures are naturally aggressive feeders. Therefore they will defend their food source from intruders, including other species or predators.

They may occasionally bite as a defense if they perceive a threat or mark their territory.

group of guppies

Unfavorable Tank Environments

Due to their fragile nature, guppies cannot withstand excessive amounts of dangerous chemicals or other contaminants in the water.

Guppies may become aggressive if the environment is nutrient-rich or highly unclean, as these conditions can make the habitat unfriendly.

Water Quality Issues

Aggression may also result from unbalanced pH levels or high contaminant concentrations in the tank water.

Lack Of Space

When you keep too many species in the same tank, they will begin to battle for food and may bite as a way to defend themselves.

Inappropriate Sex Ratio

Guppies may become combative when kept with some other male ones.

Because of their propensity to fight opponents to impress prospective partners, males often compete for the attention of females.


In some cases, your pets may get sick and become aggressive, which makes them not eat or even spit out their food.

Why is guppy spitting out food? If the food is too large or they don’t like the taste, they don’t consume them.

In some circumstances, your pets may encounter diseases, or the females are pregnant.

How To Prevent Guppies From Biting Other Species?

If you’ve noticed that your fish is showing aggressive behaviors, here are some tips to prevent them!

The primary concern is fish retain their special rights in some territorial regions.

As a result, other species won’t be able to encroach on territory set aside by more seasoned members of the communal tank.

Separating guppies in a broad space is another method for preventing fights between them.

It can help reduce aggressiveness issues and give the young time to adjust before bringing new fellows to a community tank setup.

This way, you can guarantee that all flies are entirely safe from threat and have enough space to swim around.

Additionally, feeding them foods tailored to their dietary habits, such as pellets, tubifex worms, or brine shrimp, may be helpful.

Last, using a filter with a less powerful motor or moving the tank nearer to the water surface may be beneficial.

swimming guppies

Final Thoughts

Do guppies have teeth? These fish do have teeth. Some varieties only have microscopic ridges on their tooth surfaces; others develop sharp, pointy teeth.

This species is not always aggressive, but they may bite other creatures or their brother if the environment is not ideal or you don’t give them enough food.

It’s better to pay closer attention to the young guppies before introducing them to a community tank.

Hopefully, this article will be helpful for you. Thanks for reading!