Thread-finned cichlid - Acarichthys heckelii
Scientific name: Acarichthys heckelii
Common name: Thread-finned cichlid
Family: Cichlidae
Usual size in fish tanks: 11 - 13 cm (4.33 - 5.12 inch)
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Recommended pH range for the species: 6.8 - 7.2
Recommended water hardness (dGH): 6 - 12°N (107.14 - 214.29ppm)
0°C 32°F30°C 86°F
Recommended temperature: 24 - 28 °C (75.2 - 82.4°F)
The way how these fish reproduce: Spawning
Where the species comes from: South America
Temperament to its own species: peaceful
Temperament toward other fish species: aggressive/territorial
Usual place in the tank: Bottom levels
Food and Feeding
The Thread-finned Cichlid (Acarichthys heckelii) is not a fussy eater and will readily accept a wide variety of foods. For their staple diet, provide high-quality flakes or cichlid pellets that are formulated to meet their nutritional needs. To keep them in optimal health, supplement their diet with protein-rich foods such as live or frozen bloodworms and brine shrimp, offering these treats once or twice a week. Adding vegetable matter, such as spirulina-based flakes or blanched spinach, will enhance their coloration and provide a well-rounded diet. A varied diet is key to promoting natural behaviors and keeping the fish vibrant and healthy.
Origin
The Thread-finned Cichlid is native to the freshwater rivers of South America, primarily found in the Rio Negro in Brazil. This region is known for its dark, tannin-rich waters, which are soft and slightly acidic. These cichlids typically inhabit areas with sandy or fine gravel substrates, where they can establish territories and forage for food among plants and submerged roots.
Sexing
Sexing Thread-finned Cichlids is relatively easy, as mature males are more visually striking than females. Males develop longer, more extended dorsal fins and exhibit more intense coloration, particularly during the breeding season. Females, on the other hand, tend to be smaller and have shorter, less colorful fins. During courtship and spawning, these physical differences become even more pronounced.
Breeding
Breeding Thread-finned Cichlids is quite achievable in a well-maintained aquarium. To encourage spawning, provide the fish with caves or hollow spaces created by rocks, driftwood, or overturned flower pots, as these will serve as ideal spawning sites. When breeding begins, the female will lay her eggs inside the cave, while the male guards the territory outside. The female will fan and tend to the eggs, which should hatch after approximately 3 days. About 3 days after hatching, the fry will become free-swimming and should be fed on newly hatched brine shrimp or finely crushed flake food. Maintaining excellent water quality is crucial during the breeding process to ensure the survival of the fry.
Lifespan
With proper care, Thread-finned Cichlids can live for 6-8 years in captivity. To achieve this lifespan, it is important to provide a stable environment with consistent water quality, a varied diet, and a peaceful tank setup that allows them to thrive without excessive stress.
Short Description
The Thread-finned Cichlid (Acarichthys heckelii) is a relatively peaceful species compared to other cichlids, making it a good candidate for community tanks. However, like most cichlids, they are territorial, especially during breeding, so it’s essential to provide hiding places using rocks, driftwood, and plants. These fish enjoy swimming in open spaces, so leave enough room for free swimming alongside the territories they establish. Frequent water changes (at least 20-30% weekly) are necessary to maintain high water quality and prevent the buildup of toxins, which can negatively affect their health. Though generally peaceful, Thread-finned Cichlids will defend their territory, especially during breeding, so tank mates should be chosen carefully to avoid conflict.
Picture
Bought by aqua-fish.net from jjphoto.dk.