Guppy — one of the most popular aquarium fish in the world.
🐟 Guppy Fish — Species Description
Scientific name: Poecilia reticulata
Common names: Guppy, Millionfish, Rainbow fish
📏 Size
Adult size:
Males: 3–4 cm (1.2–1.6 inches)
Females: 5–6 cm (2–2.5 inches)
Females are noticeably larger and...
Guppy — one of the most popular aquarium fish in the world.
🐟 Guppy Fish — Species Description
Scientific name: Poecilia reticulata
Common names: Guppy, Millionfish, Rainbow fish
📏 Size
Adult size:
Males: 3–4 cm (1.2–1.6 inches)
Females: 5–6 cm (2–2.5 inches)
Females are noticeably larger and less colorful
🌍 Occurrence (Natural Origin)
Native to:
Northern South America
Caribbean islands (Trinidad, Barbados, etc.)
Naturally lives in:
Slow-moving streams
Ponds
Ditches and rivers
Introduced worldwide for mosquito control
Guppies are extremely adaptable and tolerate a wide range of water conditions.
🎨 Appearance
Males:
Very colorful
Large flowing tails
Colors include red, blue, yellow, green, black, and multicolor patterns
Females:
Grey or silver body
Short fins
Hundreds of selectively bred varieties exist (cobra, tuxedo, mosaic, etc.)
🍽️ Diet (Preferred Food)
In the wild:
Omnivorous
Eats:
Algae
Insect larvae
Small invertebrates
In the aquarium:
High-quality flake or micro-pellet food
Supplement with:
Frozen or live brine shrimp
Daphnia
Bloodworms (occasionally)
Blanched vegetables (spinach, zucchini) are beneficial
🧠 Behavior & Temperament
Peaceful and active
Excellent community fish
Best kept in groups
Constantly breeding if both sexes are present
Males constantly display and chase females
Ideal ratio:
👉 1 male : 2–3 females (reduces stress)
🏞️ Preferred Aquarium Conditions
Tank size:
Minimum 40 L (10 gallons) for a group
Temperature: 22–28 °C (72–82 °F)
pH: 6.8–8.2
Hardness: Soft to hard (they prefer slightly hard water)
Décor: Plants, open swimming space
Gentle filtration
🧾 Quick Summary
Feature Details
Scientific Name Poecilia reticulata
Adult Size 3–6 cm
Diet Omnivorous
Temperament Peaceful
Breeding Livebearer
Difficulty Very easy
🐣 Breeding Note
Guppies are livebearers
Females give birth every 4–6 weeks
One mating can result in multiple future pregnancies
Fry survive easily in planted tanks
🧠 Expert Tip
Guppies are hardy, but overfeeding and overcrowding are their biggest killers. Regular water changes keep colors bright and fish healthy.