Black Marble Swordtail 3-6cm Black Marble Swordtail brings active livebearer with a named colour or fin form to a suitably prepared aquarium. Plan its home around adult space, water, diet and social needs rather than the current sale size. Quick Facts Scientific name: Xiphophorus hellerii Product type: livebearing fish Sale size: Approximately 3–6cm as listed Sale unit: Select the listed option: 4.5cm Social needs: Active livebearer; males can chase each other and females, and mixed sexes breed readily Is this for you? Perfect if: you can provide swimming room and manage sex ratios and reproduction. Consider something else if: the tank is small, very soft or unable to accommodate adult activity and fry. Why choose Black Marble Swordtail? Choose Black Marble Swordtail for active livebearer with a named colour or fin form. Base compatibility and long-term housing on its adult requirements; individual appearance and maturity can vary. Key Benefits Active livebearer with a named colour or fin form Husbandry guidance focused on livebearing fish needs Clear sale-size and sale-unit information for purchase planning Care & Specifications Provide a mature, covered aquarium with good swimming length, planted retreats and stable mineral-rich water appropriate for livebearers. Social requirements: Active livebearer; males can chase each other and females, and mixed sexes breed readily. What will you receive? You will receive the selected quantity of Black Marble Swordtail 3-6cm in the option chosen. Size within the stated range, colour, markings, finnage and sex can vary between individuals unless the listing explicitly fixes them. Acclimation & Introduction Prepare the livebearing fish aquarium before arrival and follow current NTA livestock acclimation guidance. Reduce lighting, avoid sudden changes in temperature or water chemistry, and monitor breathing, posture, feeding and interactions after introduction. Ongoing Care Offer quality flakes or pellets with vegetable matter and suitable frozen foods for variety. Maintain stable water through testing and appropriately sized water changes. Review the setup as Black Marble Swordtail grows or social behaviour changes. Pairs perfectly with A mature aquarium prepared for this livestock Reliable water tests and species-appropriate filtration Food selected for the animal’s mouth size and feeding zone NTA Insight:A juvenile swordtail needs more swimming length than its sale size suggests. Plan around adult activity and male-to-male behaviour. Before You Buy Check the adult size, social structure, water requirements and diet for Black Marble Swordtail before ordering. The listed sale size describes current stock, not its permanent size. Compatibility lists are guides only. Individual behaviour, aquarium dimensions, sex, group size and established territories can change the outcome. FAQ Will swordtails reproduce in a community tank?Usually, if both sexes are present. Plan for fry and provide females with cover from persistent courtship. Will the supplied Black Marble Swordtail match the photograph exactly?No. Livestock photographs represent the species or variety; colour, markings, finnage, size and maturity naturally vary. Is the listed size the adult size?No. It is an approximate sale size where stated. Confirm adult requirements before purchase.
