X. Helleri, Black SwordtailXiphophorus Helleri, These members of the ever popular Helleri swords display their gorgeous blue iridescent effect over a solid Dark Black body and Sword. Ours show a slight yellow tinting in all their fins making a beautiful contrast. Good sized and always active these fish will make a great accent color in your aquascape. These are strong healthy fish that would work well in a community tank. Keep them with other like sized fish. That won't be