Guppy

Physical Characteristics

Small, slender body with a distinctive colorful caudal fin. This specific individual appears to be a male variety with a delta or fan-shaped tail displaying vibrant orange and red pigmentation. Males are typically much more colorful than females, featuring iridescent patches and spots, whereas females are generally larger and drab grey.

Habitat & Distribution

Originally native to freshwater and brackish waters in northeast South America and neighboring Caribbean islands. They thrive in various environments from slow-moving streams to murky ponds. They have been widely introduced globally to control mosquito populations.

Size & Weight

Adult males typically reach 1.5 to 3.5 cm (0.6 to 1.4 inches) in length; females are larger, reaching 3 to 5 cm (1.2 to 2 inches). Weight is negligible, usually less than a few grams.

Similar Looking Species

Endler's Livebearer (Poecilia wingei) which is smaller with more neon-like, sharp metallic color patterns, and the Molly (Poecilia sphenops) which is significantly larger and has more robust body shapes.

Ecological Role

They are omnivorous limnivores, feeding on algae, detritus, and small invertebrates like mosquito larvae. They are a primary food source for larger fish and aquatic birds. Conservation status is 'Least Concern' globally, though they are considered invasive in many regions outside their native range.

Identified on: 2/18/2026

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