Aquarium fish – top 10 for beginners

Aquarium fish come in many shapes and sizes. Each species has its own needs and wishes. When you start with an aquarium, it is advisable to start with aquarium fish that are relatively easy to keep. That is, not having too many demands in order to survive well. This blog gives you the top 10 aquarium fish that are undemanding but are active and decorative. Also read the blog about keeping aquarium fish if you want to know more.

Quick solution for very useful information about aquarium fish?

Do you want to know exactly where you stand with regard to aquarium fish?  First of all, make sure you test your water quality with properly working test strips. I always use these test strips myself . In addition, I make sure that my aquarium fish build up extra resistance with Fish Guard . Works great!

1. Harlequin Fish (Rasbora Heteromorpha)

Harlequin Fish are aquarium fish originating from Southeast Asia. They grow to about 4 to 5 cm and reside in the lower and middle part of your aquarium. Aquarium fish such as the Cone Spotted Barbel are very active.

These fish feel comfortable at a water temperature of 22 to 25 degrees. Provide sufficient lighting but a densely grown aquarium. Note: it is a schooling fish so keep at least 10 pieces.

2. Guppy (Poecilia Reticulata)

Guppies are aquarium fish originating from the north of South America and the Central American Caribbean. They grow to about 4 to 6 cm and will swim in the middle and upper part of your tank.

They thrive at a water temperature of 19 to 25 degrees. It is a schooling fish that likes to form groups. Provide an average overgrown aquarium. Fun fact, this fish multiplies fairly easily.

Read Also: Guppy Fish Breeding And Keeping In Captivity

3. Zebrafish (Danio Rerio or Brachydanio)

The zebrafish originates in Southeast Asia and are between 4 and 6 cm in size. They swim in the middle and upper part of your aquarium and feel comfortable at a water temperature of 20-26 degrees.

It is a schooling fish that  likes a lot of light and an aquarium with border plants. A very active fish that can become mutually aggressive at a later age. However, this fish can be kept as a beginner fish. We wrote a blog about Guppies.

4. Swordtail Fish (Xiphophorus Helleri)

Swordtails are fish that live in Mexico and Guatemala. They grow between 6 and 10 cm and will swim in the middle and upper part  of your aquarium. The fish is quite active fun beginner fish. It feel comfortable at a water temperature of 22 to 26 degrees.

It is a schooling fish so keeps at least 12 swordtails together. Furthermore, they feel best in a reasonably vegetated aquarium. Note: ensure good harmony that there are always more females than males.

5. Endler Guppy (Poecilia Wingei)

The Endler Guppy comes from northeastern Venezuela. This fish grows to between 2 and 5 cm in size and swims throughout the  aquarium. They are small fish and therefore best when they move in a school. A temperature of 22 to 27 degrees is ideal.

As stated they are a schooling fish where there should always be more females than males. It is best to have at least a school of 15-20 pieces. Provide adequate shelter and hiding places for the fry.

6. Redfin Salmon (Aphyocharax Anisitsi)

The Redfin Salmon is a fish that originated in South America. They grow to about 5cm and are a very active fish that will swim through the middle and top of your tank. The ideal water temperature is between 19 and 27 degrees.

It is a schooling fish that can also be kept with other fish species. They do like sufficient shelter in the aquarium. This is important because they swim around in your aquarium less stressed because of the shelter.

7. Chinese Danio (Tanichthys Albonubes)

The Chinese Danio is a fish with, as the name suggests, origins in (South) China. These aquarium fish are about 4 cm in size and swim around everywhere in your aquarium. They make few demands on the water temperature, between 15 and 24 degrees  is fine.

Make sure that the temperature does not fluctuate too quickly. These aquarium fish are schooling fish that need sufficient shelter. Note: this fish sometimes has the tendency to jump out of the aquarium.

8. Platy (Xiphophorus Maculatus)

The platys are aquarium fish that originally live in Central America. They are about 6 cm in size and live everywhere in the water. Platys reproduce fairly easily in an aquarium and that is a fun scene to witness.

They feel good at a water temperature of  21 to 25 degrees. Provide an aquarium with dense vegetation. It is a schooling fish that likes to form groups. Fun fact, they eat algae! Also read the blog about other algae eating fish.

9. Siamese Fighting Fish (Betta Splendens)

The Siamese fighting fish comes from Cambodia and Thailand and grows to a size of about 6 cm. It resides in the middle and upper part  of your aquarium. With its bright colors and graceful fins a real eye-catcher.

A good water temperature is between 26 and 30 degrees. It’s a harem fish. That is, make sure that  no 2 males come together but there are several females. A reasonably vegetated aquarium with floating plants is necessary. It is truly a beautiful fish.

10. Sumatran (Puntius (Barbus) Tetrazona)

The Sumatran comes from Indonesia and Borneo. They are aquarium fish that grow to about 7 cm in size and are a beautiful sight in your aquarium with their vertical black stripes. They swim in the middle part of your aquarium and feel good at a water temperature of between 22-26 degrees .

The Sumatran is a schooling fish that needs hiding places  to feel ‘safe’. Note: these aquarium fish tend to bite off the fins of other types of aquarium fish.

Although not listed below, the most popular aquarium fish are the Neon Tetra or Cardinal Tetra. Can hardly be surpassed in terms of beauty in a large school. Read all about it in the Neon Tetra blog.


Knowledge of aquarium fish ensures that they do not die unnecessarily. Therefore, always pay close attention to the specific requirements of aquarium fish. Read the blog about setting up the aquarium for more information. Have fun with your aquarium and these fun and relatively easy to keep aquarium fish!

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