Black Swordtails (Xiphophorus helleri) are a favorite among aquarium enthusiasts. They are prized for their beauty & adaptability. They are hardy fish that easily adjust to various water conditions, making them excellent choices for beginners in fishkeeping. They are vibrant yet calm, they mix well in community tanks with other mild-mannered species. It is essential to avoid pairing them with larger, dominant fish. Swordtails will hide amidst tank decorations when feeling threatened. While they enjoy being in groups, they are not a schooling fish.