Pacific molly

Poecilia butleri

A shortfin molly whose males may show orange tail edges.

Olive-backed, silver-blue males have fine rows of spots and a rounded tail that may carry an orange rim. Females are fuller; male size and colour vary.

Adult length: Up to 7 cm
Water temperature: 23–27 °C
pH: 7–7.8
Hardness: 6–20 dGH

Natural habitat: Occupies a variety of flowing and standing waters, favouring dense algae and other aquatic vegetation.

Avoid prolonged temperatures below 18°C. Males reach 1.5 in and females 3 in.

View comparison →

Appearance and identification

Colour overlaps with P. mexicana and P. sphenops. Orange tail edges, spotting and male size alone cannot identify the species.

Same-species behaviour

Males can pressure females, so give ample cover. Larger groups and aquaria are favoured.

Diet and feeding

Feed suitable flakes and small pellets, including vegetable ingredients; do not rely on aquarium algae alone.

Compatibility limits

Similar mollies look alike. Brackish occurrences do not mean every captive stock requires salt.

Aquarium environment

Vegetation or other shelter gives females retreats.

Sources