Red Rainbowfish - Glossolepis Incisus : Complete Fish Profile & Care Guide
Table of contents
Introduction
The Red Rainbowfish (Glossolepis incisus) is an illustrious freshwater species celebrated for its striking appearance and dynamic behavior. Originating from the serene water bodies of Western New Guinea, this species showcases a vivid spectrum of colors, with males displaying an intense red hue that captivates both hobbyists and aquarists alike. Characterized by its elongated body and agile swimming capabilities, Glossolepis incisus thrives in environments that closely mimic its natural habitat.
To truly appreciate their splendour, they should be kept in schools of six or more, containing both sexes. While the Red Rainbowfish may possess a large, deep-bodied adult size, their narrow mouths prevent them from harming smaller tankmates. Yet, their swift and sudden movements could potentially stress out smaller fish, and their offspring could become an easy snack for the Rainbowfish. Therefore, carefully selecting compatible tankmates such as other Rainbowfish, Barbs, Danios, and Catfish is crucial. Aggressive species that enjoy snacking on plants, such as some Cichlids and Puffers, should be avoided.
The Red Rainbowfish exemplifies a serene, schooling fish that is perfectly matched for the planted community aquarium. Given their vivacious disposition and considerable size at maturity, it is imperative that the aquarium measures at least 4 feet in length to provide ample swimming space. Similar to numerous Rainbowfish species, juveniles may initially appear unremarkable compared to their splendid adult counterparts, leading to them being undervalued in retail settings. Yet, when introduced to the secure environment of a well-planted aquarium, these young fish will rapidly start to display their mature colors, unveiling their true magnificence. The water flow within their habitat should be kept from moderate to gentle, accommodating their preferences.
The Red Rainbowfish's physique is long, slender, with a highly arched back and a thin head. Two dorsal fins and a deeply forked mouth complete their stunning appearance. The males boast a breathtaking blood-red colouration that emphasizes their silver scales and fin colouration.
Red Rainbowfish Photos
Sexual Dimorphism
It is relatively simple to discern the sexual distinctions between male and female Red Rainbowfish. The males exhibit a pronouncedly higher back, displaying solely the red colouration, and feature longer fins. They tend to be highly territorial in nature. Conversely, the females possess an olive-brown colouration and exhibit a notably more placid temperament.
Quick Facts
| Scientific Name | Glossolepis Incisus |
|---|---|
| Year Described | 1907 |
| Other Names | Salmon-red Rainbowfish, Red Irian Rainbowfish, and New Guinea Red Rainbowfish |
| Kingdom | Animalia |
| Classification | Actinopterygii |
| Order | Atheriniformes |
| Family | Melanotaeniidae |
| Genus | Glossolepis |
| Origins | Papua New Guinea |
| Max Size | 15 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 8 Years |
Water Parameters
| Water Type | Freshwater |
|---|---|
| pH | 7.0 - 8.5 |
| GH | 10 - 20 |
| ℉ | 72 - 82 |
|---|---|
| ℃ | 22 - 27 |
Natural Habitat
Red Rainbowfish are indigenous to the Northeastern region of West Papua, New Guinea, specifically in the vicinity of Jayapura. They are uniquely found in Lake Sentani and its tributaries, nestled amidst picturesque hilly landscapes that provide a stunning backdrop for these exquisite creatures. Their natural habitat comprises streams characterized by crystal-clear, warm waters, strong currents, abundant vegetation, and bogwood, offering an ideal environment for these vibrant fish.
However, the Red Rainbowfish is currently classified as Vulnerable on the IUCN Red List, primarily due to escalating human population growth in its native area. As with all Rainbowfish species, they exhibit a heightened sensitivity to changes in water quality, with pollution and the introduction of contaminants posing significant threats to their well-being and continuity.
Breeding
Breeding Red Rainbowfish can be accomplished with relative ease when proper techniques are applied. It is imperative to establish a separate breeding tank, densely planted with fine-leaved flora, and slightly elevate the water temperature. Water with slight alkalinity and hardness is desired, and a small air-powered filter is highly recommended for proper flow and oxygenation. Spawning mops can serve as an alternative to plants when unavailable.
Before breeding, the Red Rainbowfish should be conditioned with protein-rich live or frozen food for a couple of weeks. Males will exhibit a dazzling display of intense colours, and females will become plumper when they are ready to spawn. Choose the healthiest and most vibrantly coloured fish and place them in the breeding tank.
During the spawning period, the male will lead the female to a suitable area where the female will attach clusters of eggs to available plant surfaces or equivalent via a tiny thread, and the male will fertilise them. This process will continue until the female has exhausted all her eggs. It is advisable to check the plants or spawning mops daily for any eggs and transfer them to a separate tank to avoid potential consumption by the parents.
After about a week, the eggs will hatch into small fry, requiring liquid fry food for approximately a week until they can consume food such as nauplii or brine shrimp. Raising the fry can be challenging and requires a clean water environment throughout the process until they are approximately two months old.
Diet & Feeding
The Red Rainbowfish demonstrates an adaptable feeding behavior, willingly accepting a broad range of dietary options. For optimal nutrition, their diet should predominantly consist of high-quality micropellets, flakes, granules, and green flakes. To further boost their coloration and general health, it is advisable to supplement their diet with regular offerings of freeze-dried or frozen foods, including mosquito larvae, tubifex worms, bloodworms, brine shrimp, and daphnia.
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