Fresh Water

Oryzias Sarasinorum

Beloniformes Print

Family: Adrianichthyidae
Synonym Names: Haplochilus sarasinorum Popta, Xenopoecilus sarasinorum (Popta
Classification Order: Beloniformes

More info

Datasheet

Minimum Tank Size90 litres / 23.78 US gallons
Maximum Size6.0cm / 2.36inches
Temperature24°C / 75.20°F - 29°C / 84.20°F
Hardness5.04dgH / 90ppm - 20.00dgH / 357ppm
pH7.0-8.0

General Description

The Sarasin's Buntingi, also known as Sarasin's Minnow, is a rare species within the Beloniformes order. Endemic to Lake Lindu in Lore Lindu National Park, Sulawesi Tengah province, Sulawesi, Indonesia, this fish possesses unique characteristics such as a silvery lateral stripe, a high number of lateral scales, and a pelvic brooding reproductive strategy. Classified under the family Adrianichthyidae, it is among the ricefishes and closely related to Beloniformes.

Aquarium Setup

The Sarasin's Buntingi requires a minimum tank size of 90 litres and water conditions with a pH of 7.0-8.0, hardness of 90-357ppm, and temperature ranging from 24-29°C. While it has no specific décor needs, a spacious, aquascaped setup can enhance its coloration. Plants in the aquarium provide a better chance of fry survival alongside adults, as this species may act nervously in small or sparsely decorated tanks.

Behaviour

Typically non-aggressive, the Sarasin's Buntingi thrives when kept with conspecifics in substantial groups, displaying swarming behavior. It is suggested to maintain this species alone due to its rarity. Emphasizing captive reproduction is crucial, with a recommendation to purchase six or more specimens, stimulating natural group dynamics.

Feeding and Diet

In the wild, the Sarasin's Buntingi feeds on small insects, worms, crustaceans, and zooplankton. In captivity, it accepts small live and frozen foods like Daphnia, Artemia, and bloodworms, in addition to quality flakes and granules. Providing daily meals suitable for its size sustains the health of this micropredator fish.

Reproduction & Dimorphism

The Sarasin's Buntingi practices a unique pelvic brooding reproductive strategy. During spawning, dominant males darken and defend their space, fertilizing eggs that are then carried by females using their pelvic fins. Males exhibit elongate dorsal and anal fin rays, while females have extended pelvic fins and a concave abdominal area, aiding in sex differentiation.

Habitat and Distribution

Endemic to Lake Lindu in Lore Lindu National Park, Sulawesi, Indonesia, the Sarasin's Buntingi resides in a UNESCO World Biosphere Reserve known for its tropical climate, high humidity, and diverse bird species. With Lake Lindu facing environmental threats and introduced species, the conservation status of this rare fish is uncertain, emphasizing the importance of prioritizing captive breeding efforts.

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