Rosy Loach - Tuberoschistura arakanensis, Yunnanilus sp. "Rosy" : Complete Fish Profile & Care Guide
Table of contents
Introduction
The Rosy Loach (Tuberoschistura arakanensis) represents an as-yet-undescribed species within the Dwarf Loach family. This species is distinguished by its slender form and appealing pinkish colouration, accentuated by a prominent horizontal stripe and accompanying vertical bars. The Rosy Loach is not only cherished for its striking appearance but also for its dynamic and sociable nature, along with its adaptability to various aquatic environments. Its rarity and suitability for nano-sized, heavily-planted aquariums, especially given its traditional loach shape, make it a prized specimen among aquarists.
Social interaction is paramount for the well-being of Rosy Loaches, necessitating their residence in groups of eight or more. Isolation or insufficient grouping can lead to behavioural changes, manifesting as either reclusiveness or aggression. When considering tankmates, it is advisable to choose those that are similarly small and peaceful. They are compatible with a variety of mid to upper-water column dwellers, such as rasboras, tetras, danios, and livebearers, and can coexist with other bottom-dwellers in a spacious setup, provided these tankmates are not overly timid and can compete for food.
The aquarium environment should closely mirror their natural habitat, featuring soft water movement, dense vegetation, and abundant shaded areas for refuge. A substrate of soft sand is recommended to safeguard their delicate sensory barbels. Initial sensitivity is common in newly imported Rosy Loaches; thus, introducing them to a biologically mature tank is crucial. Consistent and stable water conditions are vital for their health, underlining the importance of regular water changes and attentive maintenance.
Rosy Loach Photos
Sexual Dimorphism
Sexual dimorphism in Rosy Loaches is distinct and easily recognizable, particularly in mature specimens. The females of this species exhibit a more robust and sizeable physique compared to their male counterparts. They are characterized by a light grey body colouration interspersed with a fine array of irregular dark spots. Additionally, the lateral stripe in females is often broken or interrupted.
Males, on the other hand, display a pale orange hue that intensifies into a vivid orange during courtship periods. In males, the dark spotting is predominantly limited to the dorsal area, and they typically feature a continuous, unbroken lateral stripe. These clear physical distinctions between the sexes facilitate not only the identification of male and female Rosy Loaches but also provide insight into their breeding and social behaviours.
Quick Facts
| Scientific Name | Tuberoschistura arakanensis, Yunnanilus sp. "Rosy" |
|---|---|
| Kingdom | Animalia |
| Classification | Actinopterygii |
| Order | Cypriniformes |
| Family | Nemacheilidae |
| Genus | Yunnanilus |
| Origins | Myanmar |
| Max Size | 3 cm |
| Temperament | Peaceful |
| Aquarium Level | Bottom |
| Difficulty | Beginner - Intermediate |
| Shoaling | No |
| Best kept as | Groups 8+ |
| Diet & Feeding | Omnivore |
| Reproduction | Egg Depositor |
| Average Lifespan | Up to 8 Years |
Water Parameters
| Water Type | Freshwater |
|---|---|
| pH | 6.5 - 8.0 |
| GH | 8 - 20 |
| TDS | 90 - 268 |
| ℉ | 72 - 79 |
|---|---|
| ℃ | 22 - 26 |
Natural Habitat
Originating from the Shan State in Eastern Myanmar, Southeast Asia, the Rosy Loach thrives in a unique aquatic habitat. This region is characterized by expansive, shallow grasslands that are perpetually submerged, a result of natural spring waters being dammed.
In these environments, the water remains clear and seldom exceeds a depth of 30 centimetres. This shallow aquatic landscape is rich in lush, dense aquatic vegetation, creating an ideal ecosystem for the Rosy Loach. The interplay of clear water and abundant plant life not only forms a picturesque natural setting but also provides a nurturing habitat for this species.
Breeding
Successful breeding of Rosy Loaches in domestic aquariums has been documented, showcasing their adaptability to controlled environments. During the spawning process, these loaches deposit small, slightly sticky eggs amongst fine-leaved aquatic plants, such as Java Moss. Post-spawning, it is crucial to relocate the adult loaches to a separate habitat to prevent them from consuming the eggs.
The incubation period of these eggs typically ranges from 24 to 36 hours, depending on the ambient water temperature. Subsequently, the hatchlings, or fry, emerge and become free-swimming within an additional 24 to 36 hours.
Initially, their diet should consist of infusoria and specially formulated powdered foods suitable for fry. As they develop and grow, their dietary needs can gradually transition to include baby brine shrimp. This careful and staged feeding approach is essential for ensuring the healthy development of the fry into mature Rosy Loaches.
Diet & Feeding
The Rosy Loach, a diminutive yet fascinating freshwater fish, exhibits an omnivorous diet that reflects its adaptability and diverse nutritional needs. In their natural habitat, Rosy Loaches primarily forage on various small invertebrates, such as insect larvae, tiny crustaceans, and worms, which are abundant in their shallow, vegetated aquatic environments. This diet is supplemented by consuming various plant materials and detritus, offering a balanced intake of nutrients.
In a captive setting, it is essential to replicate this natural diet to ensure the health and vitality of Rosy Loaches. A balanced diet for these fish should include a mix of high-quality flake or micro pellet food, which provides the necessary vitamins and minerals. To cater to their carnivorous side, it's important to supplement this with live or frozen foods like daphnia, microworms, and brine shrimp. These protein-rich foods not only meet their nutritional requirements but also encourage natural foraging behaviours.
Additionally, occasional vegetable matter such as blanched spinach or zucchini can be offered to provide fibre and mimic their consumption of plant materials in the wild. Care should be taken to ensure that the food particles are small enough for the Rosy Loaches to eat, given their diminutive size. Regular feeding in controlled portions is advised to maintain optimal health and prevent issues related to overfeeding, such as water quality degradation.
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