Adonis Tetra - Lepidarchus adonis Fish Profile & Care Guide
Introduction
Though relatively uncommon in the hobby, the Adonis Tetra (Lepidarchus adonis) holds significant allure for enthusiasts seeking to enhance their planted or nano tanks, owing to its diminutive adult size and distinctive patterning. These Tetras, despite their small stature, exude an undeniable charm and captivating nature. However, their small size and specialized requirements can present some challenges, particularly with regard to maintaining appropriate territories as the males compete with each other. While peaceable with other species, the Adonis Tetra is not an ideal fit for a community aquarium. Ideally, they should be housed either alone or alongside similarly sized, non-aggressive fish such as other Tetras or smaller Catfish. Moreover, they serve as excellent dither fish for Apistogrammas or other Dwarf Cichlids.
As schooling fish, maintaining a group of 8 to 10 Adonis Tetras is optimal, facilitating the observation of intriguing behaviours and fostering a more natural-looking display. A well-suited environment for these Tetras consists of an aquarium with a sandy substrate and the inclusion of driftwood branches and roots. Adding dried leaves enhances the overall natural ambience and provides additional shelter for the fish. Dim lighting conditions tend to be better suited for the Adonis Tetras. Hardy aquatic plants such as Microsorum, Taxiphyllum, and Cryptocoryne prove beneficial to include, along with some floating vegetation.
Given their sensitivity to fluctuations in organic waste, it is crucial to introduce Adonis Tetras exclusively to mature aquariums with stable biological filtration. These Tetras possess slender silvery translucent bodies adorned with small red spots on the anterior portion and larger red blotches on the posterior region. All fins, except for the base of the caudal fin, maintain a transparent appearance. Notably, the caudal fin exhibits a distinct dark red bar, while the anal fin displays a deep red diagonal bar, adding to the species' aesthetic appeal.
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Sexual Dimorphism
Distinguishing between male and female Adonis Tetras is a relatively uncomplicated task. Typically, female specimens exhibit a more robust and fuller body shape compared to males, with the additional characteristic of pointed anal fins. Conversely, male Adonis Tetras possess a slimmer physique, accompanied by rounded anal fins.
Quick Facts
| Scientific Name | Lepidarchus adonis |
|---|---|
| Year Described | 1966 |
| Other Names | Adonis Characin, Spotted Tetra |
| Kingdom | Animalia |
| Classification | Actinopterygii |
| Order | Characiformes |
| Family | Alestidae |
| Genus | Lepidarchus |
| Origins | Ghana Sierra Leone |
| Approx Max Size | 2 cm |
| Temperament | Peaceful |
| Aquarium Level | Middle - Top |
| Difficulty | Intermediate |
| Shoaling | Yes |
| Best kept as | Groups 8+ |
| Diet & Feeding | Omnivore |
| Reproduction | Egg-Scatterer |
| Average Lifespan | Up to 5 Years |
Water Parameters
| Water Type | Freshwater |
|---|---|
| pH | 5.5 - 7.5 |
| GH | 4 - 10 |
| ℉ | 71 - 79 |
|---|---|
| ℃ | 21 - 26 |
Natural Habitat
The Adonis Tetra is a species native to West Africa, specifically found in Sierra Leone, Côte d'Ivoire, and Ghana. Its natural habitat primarily consists of shallow and warm waters, where these Tetras typically gather in substantial shoals. However, concerning their conservation status, the Adonis Tetra was classified as vulnerable by the International Union for Conservation of Nature (IUCN) Red List in 2010. This designation stemmed from mounting concerns over the escalating pollution levels detected within the waterways that serve as their habitat.
Breeding
Successfully breeding the Adonis Tetra is relatively straightforward when the appropriate water conditions are provided, although a separate breeding tank is necessary to optimize fry production. The breeding tank should feature subdued lighting and be equipped with fine-leaved plants such as java moss, or alternatively, spawning mops can be utilized with favourable results. These mediums provide suitable surfaces for the Tetras to deposit their adhesive eggs. Incorporating a mesh base within the tank is also advisable, allowing the eggs to pass through while preventing the parents from accessing them.
Adonis Tetras can be spawned in groups comprising approximately half a dozen individuals, including both males and females. Ensuring their optimal conditioning with a generous supply of live and frozen foods helps mitigate potential spawning difficulties. Alternatively, spawning can be achieved through pairing individual fish, whereby females and males are separated into their respective groups and provided with a high-quality diet consisting of frozen and live foods.
Slightly elevating the water temperature and introducing a slight acidification to the tank environment is recommended during this process. Selecting the healthiest female and the most visually impressive male for placement in the breeding tank while the females are gravid and the males display their most vibrant colours promotes successful spawning. Eggs should be promptly removed as soon as they are noticed in either scenario, as the adults may consume them if given the opportunity.
The eggs of Adonis Tetras will typically hatch within approximately 24 to 36 hours, with the fry becoming free-swimming approximately one week thereafter. Initially, nourishing the fry with infusoria-type foods for the first couple of weeks is preferable until they reach a size suitable for accepting baby brine shrimp and microworms. Given their sensitivity to fluctuating water chemistry, it is advisable to avoid performing any water changes during the initial weeks of the fry's development.
Diet & Feeding
The Adonis Tetra readily accepts a variety of high-quality dried foods, including granules, flakes, and sinking pellets, when kept in a home aquarium. These modern food formulations have been specifically designed to fulfil the nutritional requirements and promote the overall health of these fish.
While providing supplementary live, frozen, and freeze-dried food options such as bloodworms, daphnia, and tubifex once or twice a week can offer additional benefits to the well-being of the fish, it is not essential for their diet. It is important to note that bloodworms should be provided sparingly as an occasional treat rather than a staple diet, as they are challenging for fish to digest and may potentially lead to blockages.
As omnivorous creatures in the wild, Adonis Tetras also consume some vegetable matter. While most modern fish foods already incorporate plant-based components, it is possible to supplement their diet with blanched vegetables such as spinach, broccoli, and zucchini. Care should be taken not to overfeed the fish, and any uneaten food should be promptly removed the following day to maintain water quality and prevent waste accumulation.
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Published: 27 Sep 2022
Last Updated: 26 Jun 2025