Xiphophorus clemenciae Puente Chin Luis , 9km from Sarabia, Oaxaca", Mexico 2000, Kees de Jong. "The Yellow Swordtail" The auction is for seven 3/4 inch juveniles. They are a quite pretty fish with a blue-green colored body with two bright red horizontal lines and a long intense yellow sword which is thickly edged in black. Considered one of the prettiest of all small swords.