Sailfin Molly

Descrizione

Poecilia velifera, commonly known as the Sailfin Molly, is a species of livebearing fish belonging to the family Poeciliidae. It is renowned for the exceptionally large, sail-like dorsal fin of the males, which can be nearly as tall as the body itself. This species exhibits significant sexual dimorphism, with males being larger and possessing the prominent dorsal fin and a modified anal fin (gonopodium) for internal fertilization. Females are generally smaller and lack the exaggerated dorsal fin. Wild coloration typically ranges from silvery-grey to olive-green, often with rows of iridescent spots along the flanks. Through selective breeding in aquaculture, numerous color morphs and fin variations, including the 'lira' tail (lyretail), have been developed for the aquarium trade. The 'Molly lira' specifically refers to a cultivated variety of Poecilia velifera that exhibits a lyre-shaped caudal fin in addition to the characteristic large dorsal fin.

Caratteristiche fisiche

Forma del corpo

compressed

Colorazione

Wild type: Silvery-grey to olive-green, often with rows of iridescent blue or green spots on the flanks and dorsal fin. Captive-bred varieties exhibit a wide range of colors including black (Black Molly), white, orange, and various marbled patterns. The 'lira' variant specifically refers to the caudal fin shape.

Tipo di squame

cycloid

Posizione della bocca

superior

Caratteristiche distintive

Males possess an exceptionally large, sail-like dorsal fin, often with 14-19 rays (distinguishing feature from P. latipinna)., Males have a modified anal fin (gonopodium) for reproduction., The 'lira' variant has an elongated, lyre-shaped caudal fin, particularly noticeable in males., Relatively deep-bodied compared to other Poecilia species.

Pinna dorsale

Very large and sail-like in males, extending from behind the head almost to the caudal peduncle. Typically has 14-19 rays. Females have a smaller, more rounded dorsal fin.

Pinna caudale

Rounded in wild type and most cultivated forms, but specifically lyre-shaped (lira) in the 'Molly lira' variant, with elongated upper and lower rays.

Pinna pettorale

Small and rounded, positioned laterally.

Pinne distintive

Anal fin of males is modified into a gonopodium for internal fertilization. Pelvic fins are small and located ventrally.

Consigli per l'identificazione

Habitat

Tipo di acqua

brackish

Profondità

Typically found in shallow coastal waters, estuaries, and freshwater springs, often in depths less than 1 meter.

Ambiente

Inhabits coastal lagoons, estuaries, mangrove swamps, and freshwater springs and rivers that are close to the coast. Prefers areas with dense vegetation, submerged roots, and detritus. Tolerates a wide range of salinities, from pure freshwater to full marine conditions, but thrives in brackish environments.

Areale geografico

Native to the Yucatán Peninsula of Mexico, including the states of Yucatán, Campeche, and Quintana Roo, extending into Belize and Guatemala. Introduced populations exist in various parts of the world due to its popularity as an aquarium fish.

Informazioni sull'acquario

• Livello di cura: intermediate
• Temperamento: peaceful
• Dieta: omnivore
• Dimensione minima della vasca: 30 gallons
• Temperatura: 75-82°F (24-28°C)
• Livello di pH: 7.5-8.5
• Durezza: 15-30 dGH
• Compatibilità: Generally peaceful and can be kept with other similarly sized, non-aggressive community fish. Avoid fin-nippers due to the male's large dorsal fin. Best kept in groups with a higher ratio of females to males to reduce male aggression.
• Requisiti speciali: Requires hard, alkaline water, often benefiting from the addition of marine salt (1-2 teaspoons per gallon) to mimic their natural brackish habitats. A well-planted tank with open swimming areas is ideal. They are sensitive to poor water quality and require stable parameters. Regular water changes are crucial. The 'lira' tail variant may be more prone to fin damage if tankmates are aggressive or if water quality is suboptimal.

Informazioni in natura

• Stato di conservazione: least concern
• Stagionalità: Breeds year-round in suitable conditions, with peak reproductive activity often linked to warmer temperatures and abundant food resources.
• Prezzo di mercato: Varies significantly based on size, coloration, and finnage (e.g., lira tail). Wild-caught specimens are less common in trade than captive-bred.
• Importanza commerciale: high
• Sapore: Not typically consumed by humans due to small size and bony nature.
• Consistenza: N/A
• Valore nutrizionale: N/A

Fatti chiave

Specie simili

Classificazione scientifica

Regno

Animalia

Phylum

Chordata

Classe

Actinopterygii

Ordine

Cyprinodontiformes

Famiglia

Poeciliidae

Genere

Poecilia

Specie

Poecilia velifera

Esplora Sailfin Molly