Swordfish is one of the most popular freshwater aquarium fish. The name comes from the Greek word Xiphophorus ξίφος (sword) and φόρος (carrier). Swordtail Livebearers included in the class, ie fish that breed through internal fertilization. Unlike most fish spawn, Livebearers gave birth to their children. Together Guppy fish (Poecilia reticulata), Platy (Xiphophorus maculatus) and Molly (Poecilia sphenops), incorporated in the family Poecilidae Swordtail.
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