Interrupted Line Danio - Devario interruptus Fish Profile & Care Guide
Introduction
The Interrupted Line Danio (Devario interruptus) is a striking freshwater fish species renowned for its distinctive colouration and markings. This species captivates aquarists and enthusiasts alike with its visually striking appearance. With its relatively straightforward care requirements, Devario interruptus holds significant appeal for both beginner and experienced aquarists seeking to enrich their aquatic displays.
When selecting tankmates for Interrupted Line Danios, choosing similarly-sized and resilient species that share their calm demeanour is advisable. Consider introducing larger Cyprinids such as Barbs, notable Tetras, charismatic loaches, elegant Cichlids, or graceful Catfish as suitable companions for these distinguished Danios. However, exercise caution when selecting tankmates, as slower-moving or timid species may become unsettled by the constant activity and lively feeding behaviour of the Interrupted Line Danio. It is also wise to avoid housing them alongside species with long trailing fins, as the energetic nature of the Danios may lead to fin-nipping.
In their natural habitat, Interrupted Line Danios are social creatures that thrive in shoals, displaying vibrant colours during competitions for female attention among males. To replicate their natural environment and ensure their well-being, maintain these Danios in groups of at least six individuals, preferably more. This not only promotes the comfort of the fish but also enhances the authenticity and liveliness of your aquarium.
Creating a well-planted aquarium or mimicking a flowing stream or river environment provides an ideal setting for Interrupted Line Danios. Utilize gravel, diverse pebbles, or smooth rocks as a substrate for a touch of natural beauty. Incorporating additional powerheads or filter outlets can provide gentle water flow, although care should be taken to avoid excessive currents, as these Danios prefer calmer waters in the wild.
Enhance the aesthetic appeal and comfort of the Danios with driftwood roots, branching structures, and resilient aquatic plants such as Anubias, Microsorum, or Bolbitis. Regular water changes are essential to maintain water cleanliness, as Interrupted Line Danios are sensitive to accumulating organic waste. Additionally, ensure a tight-fitting lid for your aquarium, as Danios are known for their jumping abilities, requiring prevention of escape through any gaps.
Interrupted Line Danios are distinct with a pattern of short and wide vertical bars or blotches on their sides, followed by a prominent horizontal dark lateral stripe that terminates at the base of the caudal fin. They also feature a golden yellow longitudinal band extending towards the base of the caudal fin. Male Danios have a slight red hue on their ventral side, while females display a subtle yellow colouring. These fish are unique in that they possess a truncated lateral line and lack barbels.
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Photos
Sexual Dimorphism
Differentiating between male and female Interrupted Line Danios is relatively straightforward. Mature females typically exhibit a rounder belly, subdued colouration, and slightly larger size compared to males. Additionally, in breeding conditions, dominant male specimens display a bright orange colouration along the lower half of their body.
Quick Facts
| Scientific Name | Devario interruptus |
|---|---|
| Year Described | 1870 |
| Kingdom | Animalia |
| Classification | Actinopterygii |
| Order | Cypriniformes |
| Family | Cyprinidae |
| Genus | Devario |
| Origins | China |
| Approx Max Size | 8 cm |
| Temperament | Peaceful |
| Aquarium Level | Middle - Top |
| Difficulty | Beginner - Intermediate |
| Shoaling | Yes |
| Best kept as | Groups 6+ |
| Diet & Feeding | Omnivore |
| Reproduction | Egg-Scatterer |
| Average Lifespan | Up to 5 Years |
Water Parameters
| Water Type | Freshwater |
|---|---|
| pH | 6.5 - 7.5 |
| GH | 5 - 20 |
| TDS | 36 - 179 |
| ℉ | 61 - 70 |
|---|---|
| ℃ | 16 - 21 |
Natural Habitat
Interrupted Line Danios are indigenous to the Irrawaddy River Basin in Yunnan, China. These danios thrive in mountain streams characterized by clear, swiftly flowing water over a cobble substrate. While vegetation is typically sparse, marginal vegetation may be occasionally encountered in their habitat.
Breeding
Interrupted Line Danios, distinguished by their intriguing reproductive behaviour, often engage in spawning activities when conditions are optimal. In a well-established, densely planted aquarium, it is not uncommon to witness the emergence of a modest number of fry without external intervention. However, for those aiming to increase the number of offspring, a more controlled approach is necessary.
To initiate successful breeding, it is advisable to condition the adult group together, ensuring overall health and readiness. Simultaneously, setting up a separate breeding tank filled halfway with mature water becomes imperative. Maximizing space within the breeding tank with appropriate spawning mediums like java moss or spawning mops or using mesh or marbles at the tank's base for egg shelter proves beneficial. Maintaining a slightly acidic to neutral water pH and a slightly elevated temperature creates an optimal spawning environment. Additionally, introducing an air stone or air-powered sponge filter aids in water movement and oxygenation within the breeding tank.
Once adult fish are adequately conditioned and females show fullness from carrying eggs, introducing one or two pairs into the breeding tank is recommended. Providing small amounts of live and frozen food can trigger desired spawning behaviour. Multiple spawning events may occur before a female depletes her egg supply. Typically, spawning begins within 24 hours, with the female slimming down noticeably after depositing all her eggs. Subsequently, removing adult fish from the breeding tank after 48 hours prevents egg consumption.
Egg incubation duration is temperature-dependent, usually lasting between 24 and 36 hours. After this period, fry emerge as free-swimming entities, displaying signs of independent life. Providing appropriate sustenance is crucial during early development stages. Starting their diet with options like Paramecium, liquid fry food, or finely powdered alternatives ensures healthy progression. As the fry grows and accepts more substantial nourishment, transitioning to newly hatched brine shrimp or microworms around the one-week mark is suitable.
Diet & Feeding
Interrupted Line Danios exhibit adaptable feeding behaviour in aquarium settings. While they are not highly selective eaters, including high-quality dried food as their primary dietary staple is advisable. Additionally, supplementing their diet with a diverse range of food options ensures optimal nutrition and vibrant colouration. This may entail offering frozen, live, and freeze-dried foods such as mosquito larvae, brine shrimp, bloodworms, daphnia, and cyclops. Aquarists can promote the overall health, colouration, and condition of their Interrupted Line Danios by providing a varied diet.
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Published: 24 Apr 2024
Last Updated: 24 Apr 2024