Lovingly named due to its bright orange head, shimmery white body and sharp tail fin, the Santa Claus Swordtail or Xiphophorus helleri are a rare freshwater species with fascinating Koi-like colorations. 
Its unique appearance and peaceful disposition make it a perfect choice for all aquarists. Swordtails can grow up to three inches long but due to their longer fin, it’s best to avoid pairing your Swordtail with other fin-nipping species.