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Aquarium Sharks – Everything You Need to Know

Aquarium Sharks – Everything You Need to Know


The first step in adding a shark to your aquarium is to decide what kind of fish you would like to include. There are four main types of shark: Iridescent, Bala, and Red-tailed black sharks.

You should choose these fish for their unique characteristics, but keep in mind that they are not compatible with every other type of fish in your tank. Besides, these fish are likely to eat other aquatic life, including small fish and shrimp.


Red-tailed black sharks

This is an omnivorous fish and should be kept in a community tank with other species. Red-tailed black sharks are omnivorous, but they are also territorial.

You should choose tank mates carefully, since this fish can become aggressive if their space is violated. Red-tailed black sharks are not aggressive towards other species, but they may tire out other fish in the tank if they are too active.

The diet of this species is an omnivore mix, consisting primarily of plants and crustaceans. It will also consume small insects and worms. This species will eat live food, pellets, and flakes, and will tolerate some acidic water.

Red-tailed black sharks do well in a tank containing at least a half liter of water. You will also want to keep plenty of plants and other prey, including algae.

Bala sharks

The Bala shark is an eye-catching aquarium fish that gets along well with most other types of tank mates. Their size corresponds with their high level of activity, and they are not particularly aggressive, but they do get along well with other species of fish.

Here are some tips on how to care for this beautiful fish. Keep in mind that you should never keep a single Bala shark in a tank. In fact, the species should be kept in a school of at least five or six.

However, you should keep in mind that dominant species may act aggressively towards weaker members of the tank, and this can be quite stressful for the fish.

The aquarium temperature should be between 72 and 80 degrees Fahrenheit, as they are sensitive to temperature fluctuations. You should also keep the tank water clean and stress-free. For best results, use an external canister filtration system.

The bala sharks prefer an aquarium setup that mimics their natural habitat. To achieve this, place dark-colored pebbles and live plants throughout the tank substrate.

Harlequin sharks

While beautiful, Harlequin Sharks live an solitary existence. They rarely interact with other fish, and are territorial against similar-looking species.

Although they can be kept in aquariums with other species, they are best kept alone. As bottom-dwelling fish, they can be difficult to maintain if kept with larger species. Here are some things to keep in mind when caring for these beautiful animals.

Since Harlequin Sharks are territorial, they will hunt other fish, so their tank should have lots of dark, hiding areas. It is advisable to include plants that are tough enough to withstand their grazing behavior.

Many aquarists have reported better success housing this species with fast-moving medium-sized fish.

Harlequin Sharks can be a fun addition to your aquarium, but you should keep in mind that they can be a hassle to care for.

Iridescent sharks

Keeping iridescent sharks in your aquarium may be an excellent idea if you are looking to add a splash of color to your tank. Iridescent sharks are highly energetic and jumpy. While they are generally harmless to humans, they are prone to getting spooked easily.

If you do happen to catch one of these beautiful fish, you should be aware of these behaviors and be sure to prevent them from bothering your other fish.

Iridescent sharks need a high-quality food source, which is flakes or pellets. They don’t like nitrates, so a weekly 25% water change is ideal.

You’ll also need to ensure the tank has plenty of open space. They are often best kept in schools of five or more. Iridescent sharks should be kept in groups of at least four or five to avoid fighting among themselves.


As one of the most popular aquarium shark fish, Harlequins require an aquarium of at least 55 gallons and a densely planted habitat. They prefer a gravel substrate, silty rocks, driftwood branches, and nooks.

A good aquarium substrate is made up of fine sand and rounded gravel to protect their sensory barbs and mouths. Other important considerations for Harlequins include a powerhead and a beneficial current.

Harlequin rasboras are relatively easy to breed in a home aquarium. These small fish reach a maximum size of 1.5 inches (4 cm) and are available in many colors.

Harlequin rasboras have been a staple of the fish trade since the 1930s. They develop stunning gold coloration as they mature and can maintain tight schooling formations in the aquarium.




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