Yellowtail Purple Tang are definitely a spectacular show stopper in any marine aquarium. This is notable because they are quite rare and difficult to obtain. They have a beautiful purple body with contrasting yellow tipped pectoral fins and yellow tail. Growing up to 25cm, these need to be kept an aquarium with plenty of open swimming space and rock work to graze on. An aquarium of at least 300 litres is required to keep these fish happy.