freshwater
Guppy
Poecilia reticulata
Small, slender body with significant sexual dimorphism. Females are larger and usually drab in coloration, whereas males are smaller, highly colorful, and feature elaborate, flowing caudal and dorsal fins with variable patterns including spots, stripes, and iridescent patches.
- Habitat
- Native to freshwater streams, warm springs, and ponds in…
- Size & weight
- Adult females typically reach 4 to 6 cm in length, while…
- Diet
- Omnivorous, feeding primarily on microalgae, plant matte…
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Physical characteristics
Small, slender body with significant sexual dimorphism. Females are larger and usually drab in coloration, whereas males are smaller, highly colorful, and feature elaborate, flowing caudal and dorsal fins with variable patterns including spots, stripes, and iridescent patches.
Habitat & distribution
Native to freshwater streams, warm springs, and ponds in northeastern South America, but widely introduced globally in tropical and subtropical freshwater and brackish environments.
Behavior
Active, peaceful, and highly social schooling fish that prefer to live in groups. They are diurnal and constantly active near the water surface or mid-water.
Diet
Omnivorous, feeding primarily on microalgae, plant matter, zooplankton, and insect larvae.
Reproduction
Viviparous (live-bearing). Females store sperm to fertilize multiple broods from a single mating. Gestation lasts roughly 21 to 30 days, producing free-swimming fry that receive no parental care.
Ecological role
Acts as an important consumer of mosquito larvae and other small aquatic invertebrates, helping regulate insect populations, and serves as a prey base for larger aquatic predators.
Similar species
Endler's livebearer (Poecilia wingei), which is smaller, possesses distinct neon color markings, and lacks the extended gonopodium structure typical of standard guppies.
Identification tips
Look for the small upturned mouth, rounded dorsal fin, and distinctive male coloration patterns or female body shape with a gravid spot near the anal fin.
Interesting facts
Guppies are among the most popular aquarium fish in the world and have been extensively used in scientific research regarding genetics, evolution, and behavioral ecology.