Pencil Fish Characteristics and How to Keep Them

The pencilfish is a tropical fish of the family Leviocinae and genus Nanostomus of the order Calasinidae, native to the Amazon River and the Negro River in South America. In this article, I would like to explain in detail the characteristics of the pencil fish and how to keep it.

What is Pencil Fish?

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The pencilfish is a tropical fish in the genus Nanostomus of the family Leviacinae of the order Calasinidae. The pencilfish originates from the Amazon and Negro rivers in South America.Pencilfish have an elongated body shape and swim by drifting at an angle. The pencilfish's name comes from the way it swims, which looks like it is writing something with a pencil. The pencilfish has a simple body color with a single black and gold line on the side of its body.

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How to keep pencilfish

The lifespan of a pencilfish is about 2 to 3 years. Their body size is approximately 4 to 6 cm. However, both lifespan and body size vary depending on the environment in which they are kept and the food they are fed. Pencilfish prefer slightly acidic to neutral water, with a pH range of 5.5 to 7.0. Pencilfish are classified as tropical fish, so if you keep them in Japan, you will need a heater in winter.

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Points to keep in mind when mixing swimmers

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Regarding mixing, first of all, pencilfish are a docile breed. Therefore, they are unlikely to harm other fish.On the other hand, if the species to be mixed with pencilfish is a species that harms other fish due to its territoriality, etc., it will be the first to be harmed, so be sure to investigate this beforehand. The recommended breed for mixing with pencilfish is the same calasin variety. Pencilfish have an elongated silhouette among the calasin family, so it is recommended to mix them together to enhance their characteristics.

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Points about spawning

Many people who keep pencilfish want to breed them. In breeding pencilfish, it is essential to distinguish between males and females. To distinguish between male and female pencilfish, male pencilfish have a more pronounced pattern and coloration. Females tend to be less patterned and colored and have a fuller abdomen.If you put male and female pencil fishies in, they will spawn on the underside of the wide leaves. Then, approximately 30-50 fry will be born. About 5 days after spawning, the fry will begin to swim and eat, and should be fed with fry food.

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What to look for when keeping pencilfish

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Pencilfish have an elongated body shape and simple body coloration with a single black and gold line. Because of this, pencilfish can be easily mixed with any species, making them very useful. The pencilfish also has a distinctive swimming style, which makes it a popular species in secret.Pencilfish are unique among the popular calacinids, and are recommended for those who keep "neon tetras" or "cardinal tetras" and are looking for other varieties. If you are interested in Pencil Fish, we recommend that you visit a specialty store to take a look.

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