sentences:  Rather, the closest relatives to "Herotilapia" are "Tomocichla", "Rocio", "Astatheros" and "Cribroheros", of which "Rocio" (including the Jack Dempsey) has the most similar morphology.The rainbow cichlid can reach 12–15 cm in length, but most adults are around 7–8 cm.The fish is generally yellow, with hints of reds and browns.