Butterfly Goodeid (Ameca splendens) — 5-6cm

Overview

The Butterfly Goodeid, scientifically known as Ameca splendens, is a striking, peaceful Mexican livebearer that brings vibrant colour and active behaviour to cool, hard-water community aquariums. Available for freshwater fish UK, this species reaches up to 9cm in length and thrives in tanks of at least 80 litres with hard, alkaline water and cooler temperatures than most tropical fish. Endemic to the Ameca River drainage in Jalisco, Mexico, the Butterfly Goodeid is a rare and fascinating addition to temperate aquariums, offering flowing fins, engaging personality, and manageable care for dedicated aquarists.

Appearance

Male Butterfly Goodeids display stunning coloration with metallic blue, green, and orange hues that shimmer under aquarium lighting. The body is streamlined with a deep profile, and the caudal fin is edged with bold yellow or orange bands that create a butterfly-like appearance—hence the common name. Females are more subdued, typically displaying olive or tan coloration with less pronounced fin coloration. Males develop elongated anal fins and more intense colours as they mature. Overall, the Butterfly Goodeid is a beautiful, understated fish that fits perfectly into cool-water community setups and planted aquariums.

Natural Habitat

Endemic to the Ameca River drainage in Jalisco, Mexico, especially the Rio Teuchitlán area near Teuchitlán and Ameca, the Butterfly Goodeid inhabits clear, fast-flowing streams and springs with rocky substrates and dense aquatic vegetation. The water is typically hard, alkaline, and well-oxygenated, with temperatures that vary seasonally but remain cooler than typical tropical aquariums. In the wild, these fish feed on algae, aufwuchs, small invertebrates, and detritus. Sadly, wild populations have declined dramatically due to habitat destruction and pollution, making the species critically endangered in nature. The aquarium trade plays a vital role in preserving this species through captive breeding.

Aquarium Setup

A minimum tank size of 80 litres is suitable for a group of Butterfly Goodeids. Use a substrate of sand or fine gravel, and plant the aquarium densely with hardy plants such as Java fern, Anubias, and Vallisneria. Include driftwood and smooth rocks to create hiding places and visual interest. Provide moderate water movement and excellent filtration to maintain clean, well-oxygenated water. Perform weekly water changes of 25-30% and maintain hard, alkaline water (pH 7.0-8.2). The aquarium should be well-covered, as these active fish may jump. Subdued lighting and a naturalistic setup will encourage confident behaviour and vibrant coloration.

Feeding

Butterfly Goodeids are omnivores with a strong preference for plant-based foods. Offer a varied diet with a strong plant component, including quality spirulina flakes, algae-based foods, blanched vegetables such as spinach and courgette, and small live or frozen foods such as daphnia and brine shrimp. Feed small portions 2-3 times daily, and ensure plant-based foods are available regularly to support digestive health. Avoid overfeeding meaty foods, as an overly protein-rich diet can lead to health issues. A balanced diet will enhance coloration and support the species' natural grazing behaviour.

Behaviour

The Butterfly Goodeid is a peaceful, active fish that thrives in groups of at least six individuals. Males may display to each other and engage in mild territorial behaviour, but aggression is rarely serious if the tank is appropriately sized and structured. They are constantly in motion, grazing on algae and exploring all levels of the aquarium. Butterfly Goodeids are non-aggressive towards other species and make excellent community fish. Their lively, engaging behaviour and striking colours make them a joy to observe in a well-maintained temperate aquarium.

Tank Mates

Choose tankmates carefully to ensure compatibility with these cool-water fish. Suitable companions include other peaceful temperate fish of similar size and non-aggressive snails. Avoid aggressive fish, fin-nippers, large predatory fish, very warm-water tropical species, and highly competitive or boisterous species. The Butterfly Goodeid is best kept in a species tank or a carefully curated cool-water community with other temperate fish that thrive in similar conditions. Avoid mixing with typical tropical fish that require warmer temperatures.

Breeding

Butterfly Goodeids are livebearing goodeids that usually breed readily in good conditions. Females give birth to relatively few, well-developed young after a gestation period of approximately 6-8 weeks. The fry are large and can be raised immediately on finely crushed flakes and newly hatched brine shrimp. Provide dense plant cover and separate fry if needed to improve survival, as adults may eat newborns. With stable conditions and a well-maintained aquarium, breeding colonies can establish themselves over several months, contributing to the conservation of this critically endangered species.

Why Buy from Tropical Fish Co

Tropical Fish Co is a trusted supplier of tropical fish online UK, offering healthy, well-conditioned Butterfly Goodeids sourced from reputable breeders and quarantined for quality assurance. We provide expert guidance on hard water tropical fish care, tank setup, water chemistry, and compatible tankmates to help you create a thriving cool-water community aquarium. With secure packaging, reliable tropical fish delivery UK, and a commitment to customer satisfaction, Tropical Fish Co makes it easy to buy tropical fish UK with confidence. By purchasing captive-bred Butterfly Goodeids, you're supporting the conservation of this critically endangered species.