Green Texas Cichlid Care Guide - Aquarium Setup, Diet & Breeding

The Green Texas Cichlid is a large, powerful-bodied New World cichlid with a blue-green to turquoise base colour and iridescent green or blue spots across the body and fins. Mature fish can develop striking patterning, with darker vertical markings and an orange, red or copper-toned edge along the lower body and fins. Their appearance becomes especially vivid when they are displaying or defending a territory.

Despite the common name, this species is not a small community aquarium fish. It is intelligent, inquisitive and highly territorial, and adults often rearrange their surroundings while investigating the aquarium. Individuals can show considerable variation in temperament, with some becoming particularly aggressive toward other cichlids.

In the wild, Green Texas Cichlids occupy warm waters with rocky areas, submerged wood, vegetation and sandy or muddy sections. They use cavities and solid surfaces for shelter, courtship and spawning, while their robust build allows them to forage across a range of river and lagoon habitats.

This species is the true Texas Cichlid, Herichthys cyanoguttatus, and is one of the larger cichlids native to the United States. Its bold colouration, substantial size and complex behaviour appeal to experienced aquarists who can accommodate a large, assertive fish.

Green Texas Cichlids are native to the lower Rio Grande drainage of southern Texas in the United States and adjacent northeastern Mexico. They inhabit warm, slow-moving rivers, streams, backwaters and associated lagoons in the Gulf Coast region of North America.

An adult Green Texas Cichlid should have at least a 300-litre aquarium, with a larger footprint of around 150 x 50 cm preferred for one adult; a pair or community of large cichlids requires substantially more space. Use a sturdy aquarium with strong filtration and secure equipment, as this species is powerful and may move decor. Provide open swimming room, smooth rocks, robust wood and caves or other visual barriers, with a sand or fine rounded-gravel substrate. Hardy plants may be uprooted or damaged, so planted decor should be selected with care.

Up to 30 cm (12 in) in total length. Males are usually larger and more heavily built than females; females commonly remain closer to 20–25 cm (8–10 in), although individual size varies.

Green Texas Cichlids are omnivorous and should receive a varied diet based on a quality large-cichlid pellet or granule. Supplement this with foods such as earthworms, prawns, mussels, insects and appropriately sized frozen preparations, along with some vegetable matter such as spirulina-based foods or softened peas. Feed sensible portions rather than allowing this naturally vigorous fish to become overfed, and avoid relying on fatty mammalian meats.

Green Texas Cichlids are best kept alone or with a carefully selected, similarly sized and robust companion in a very large aquarium. Possible tankmates include large Central or South American cichlids, large catfish such as plecos, and other durable fish that can tolerate warm, hard water, although compatibility is never guaranteed. Avoid small fish, peaceful community species, delicate tankmates and slow-moving fish, which may be harassed, injured or eaten. A bonded pair can also become exceptionally aggressive toward all other fish during spawning.

Green Texas Cichlids are substrate-spawning biparental cichlids that form pairs when mature. The female lays several hundred eggs on a smooth rock, slate, flowerpot or other cleaned surface, and both parents guard the eggs and newly free-swimming fry. Spawning is encouraged by excellent water quality, a varied diet and a suitable breeding surface. The fry can be raised on newly hatched brine shrimp and other appropriately sized foods, although the parents may become extremely defensive during breeding.

Males generally grow larger, with a broader head, heavier body and longer extensions on the dorsal and anal fins. Mature males may also develop more pronounced nuchal thickening, while females are usually smaller and more compact, particularly when compared with fully grown males.