freshwater
Guppy
Poecilia reticulata
Highly variable appearance with significant sexual dimorphism. Males are usually smaller with elaborate, brightly colored ornamental fins and tails. They possess a gonopodium, a modified anal fin used for internal fertilization.…
- Habitat
- Found in various freshwater and brackish environments in…
- Size & weight
- Standard size ranges from 1.5 to 3.5 centimeters (0.6 to…
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Physical characteristics
Highly variable appearance with significant sexual dimorphism. Males are usually smaller with elaborate, brightly colored ornamental fins and tails. They possess a gonopodium, a modified anal fin used for internal fertilization. Females are typically larger, rounder, and have more subdued, greyish-silver coloration with less dramatic finnage.
Habitat & distribution
Found in various freshwater and brackish environments including streams, rivers, ponds, and marshes. They are native to South America and the Caribbean, specifically Venezuela, Guyana, Trinidad and Tobago, and Brazil, but have been introduced globally to control mosquito populations.
Ecological role
Functions as an opportunistic omnivore, consuming algae, plant fragments, small insects, and larvae. They serve as a vital food source for larger fish and birds. Their conservation status is 'Least Concern' as they are highly adaptable and prolific breeders.
Similar species
Poecilia wingei (Endler's Livebearer), which is smaller and features more metallic, neon-colored patterns and a different tail structure; Gambusia holbrooki (Eastern Mosquitofish), which lacks the colorful ornamentation of male guppies.