All fish / Poeciliidae

Mangrove Molly

Poecilia orri

Also known as mangrove molly, orr's molly, roatan molly, poecilia orri

A small wild molly from coastal mangroves and lagoons, silvery with rows of small dark or orange spots and a modest dorsal fin. Keepers of wild-type livebearers value it for its natural look, active grazing behaviour and its role in conserving pure regional populations.

Care at a glance

Care level

Moderate

Temperament

Peaceful

Adult size

6 cm

Temperature

24 to 30 °C

pH

7.5 to 8.5

Smallest tank

80 litres

Keep as

Group of 6 or more, more females than males

Diet

Omnivore: algae, spirulina flakes, vegetable matter, small live and frozen foods

Swims

Top of the tank

Lifespan

2 to 4 years

Water

Brackish

Wild range

Caribbean coast of Central America and Mexico (Yucatán to Honduras, Roatán, Cozumel, Belize)

Breeding

A livebearer that gives birth to small batches of fully formed young after internal fertilisation, and breeds readily in hard or slightly brackish water. Adults may eat fry, so dense plants or a separate rearing tank improve survival.

Good to know

It does best in hard, alkaline water with some added salt and may struggle in soft fresh water. It is often kept as part of the Poecilia mexicana or sphenops group, so keep collection localities separate and don't cross it with other mollies.