Pineapple Swordtail Care Guide - Aquarium Setup, Diet & Breeding

The Pineapple Swordtail is a selectively bred colour variety of the popular swordtail, rather than a separate species. Its warm yellow, orange and red tones resemble the colours of ripe pineapple, although the exact pattern varies between strains and individual fish. The body is typically deeper in colour toward the rear, while the fins may show golden yellow, orange or red highlights.

Mature males are instantly recognisable by the long, sword-shaped extension on the lower part of the caudal fin. Females lack this sword and are generally larger-bodied and more rounded. Like other swordtails, these fish have an elongated, laterally compressed body and an upturned mouth suited to feeding near the surface.

In nature, Xiphophorus hellerii inhabits clear to moderately cloudy flowing waters, including streams, rivers, springs and quiet margins with aquatic vegetation. It is an active, alert fish that spends much of its time in the middle and upper areas of the water column, moving confidently through open spaces and plant growth.

Pineapple Swordtails are lively, social community fish with distinct but usually manageable male displays. Males may chase females and spar with one another, particularly in cramped quarters, but they are not generally aggressive toward unrelated peaceful species. Their bright colour, livebearing habits and energetic personality have made them a long-standing favourite in freshwater aquariums.

Pineapple Swordtails are a cultivated colour form of the Green Swordtail, Xiphophorus hellerii. The wild species is native to freshwater streams, rivers and springs on the Atlantic and Pacific slopes of Mexico, extending south through Guatemala, Belize and Honduras in Central America; aquarium populations have since been introduced to many warm regions worldwide.

A small group should have an aquarium of at least 80 litres, with a footprint around 60 × 30 cm and sufficient height for active swimming; a larger aquarium is preferable for several females and their fry. Provide open swimming space alongside sturdy plants, including tall background growth and floating cover, with gentle to moderate water movement and a secure lid. Use fine gravel or sand over a well-maintained substrate, and include wood, rocks or dense planting to create visual breaks without crowding the swimming area. Efficient filtration and regular maintenance are important because swordtails are active, relatively heavy-bodied livebearers.

Males grow to about 12 cm (4.7 in), including the caudal sword, while females can reach approximately 15 cm (5.9 in). Aquarium specimens are often somewhat smaller, and the female is normally the larger, deeper-bodied sex.

Pineapple Swordtails are omnivores with a strong preference for vegetable matter. Offer a varied diet of quality flake or small pellet food, supplemented with spirulina-based foods, blanched spinach, zucchini or shelled peas. Frozen or live foods such as brine shrimp, daphnia and bloodworms provide useful variety but should not replace plant-rich staples. Feed small portions once or twice daily, giving only what the fish consume promptly.

Pineapple Swordtails suit peaceful community aquariums containing similarly sized, active fish. Suitable tankmates include platies, mollies, larger peaceful tetras, rasboras, danios, peaceful barbs, Corydoras and smaller peaceful rainbowfish. Avoid housing them with fin-nipping species, highly aggressive cichlids, very timid fish or predatory species large enough to swallow them. Males can harass one another and females, so a group with more females than males is preferable.

Pineapple Swordtails are prolific livebearers and will usually breed without special intervention. Keep one male with at least two or three females to reduce persistent attention on any individual female. After mating, the female gives birth to free-swimming fry after roughly four to six weeks, although she may store sperm and produce several broods. Dense plants such as Java moss, guppy grass or floating cover provide refuge for fry, while a separate nursery area can improve survival because adults may eat their young. Feed the fry finely powdered food, crushed flakes or suitable live foods several times a day.

Males are smaller and slimmer and develop a conspicuous sword-like extension on the lower edge of the caudal fin. They also possess a gonopodium, a modified anal fin used for reproduction. Females are larger and rounder, lack the sword and retain a fan-shaped anal fin.