Common Guppy

Adults reach a length of 3 to 6 cm. Males are smaller and more slender, their coloration includes orange, turquoise, and black spots. Females, on the other hand, are larger, their bodies are uniformly gray, and their bellies have a prominent silvery hue.

Originally, these fish inhabited waters in the northeastern part of South America, including Venezuela, Guyana, Suriname, and French Guiana, as well as island nations in the southern Caribbean, such as Trinidad and Tobago, Barbados, and Antigua and Barbuda. Now their habitat range has expanded significantly: the fish have been introduced to many other countries, including European ones, to combat mosquito larvae. These inhabitants prefer shallow waters densely overgrown with aquatic vegetation and can be found in a wide variety of biotopes — from flowing forest streams to murky tropical swamps and brackish river estuaries.

The Common Guppy is a peaceful and calm fish. It coexists well with many other species of similar size and temperament, making it suitable for a community tank.

The minimum recommended aquarium volume for a group of 3–5 Common Guppies is 40 liters. Guppies are often kept in far more modest containers, but a vessel of a few litres is a poor choice: in such a small volume the temperature and water chemistry change too quickly. Although aquarium decor is not critically important, it is advisable to provide several shelters in the form of dense plant thickets. These will become a refuge for fry, whose appearance is inevitable when adult males and females are present. Guppies adapt well to various conditions and can even live in brackish water. With regular aquarium maintenance and a small number of individuals, long-term keeping is possible without a heater or filtration system.

These fish readily accept most common foods of appropriate size — both dry and frozen or live.

For fry to appear, only one condition is sufficient — the presence of a female and a male, as they successfully reproduce on their own. Fry appear regularly. Due to poorly developed parental instincts, juveniles can become prey for adult fish, so it is recommended to timely transfer the offspring to a separate tank.

This species is considered one of the most resilient even among all Guppy varieties. Diseases occur quite rarely, mainly in neglected aquariums, due to injuries, or through contact with already sick fish.

When purchasing, choose active and mobile individuals that show interest in food. Avoid fish with clamped fins, film on the body, spots, or signs of emaciation. A healthy guppy should have clean, transparent fins without signs of damage or 'clumping'. — Inspect the aquarium in the store: the presence of dead or clearly sick fish in adjacent tanks is a reason to refuse the purchase. — Choose individuals with bright, clean coloration appropriate for their sex and age. — Avoid fish with an unnaturally bloated or, conversely, severely sunken belly, which may indicate internal diseases.