Phalloceros harpagosPhalloceros harpagos, the ellipse spot toothcarp, is a species of poeciliid fish native to Brazil.DistributionPhalloceros harpagos is found in South America and is found in the Rio Paraná-Paraguay basin and also the coastal drainages from rio Itaboapana to the rio Araranguá.SizeThe females of this species grow to a total length of, while males remain smaller at.HabitatThe fish live in tropical freshwater; and are benthopelagic.EtymologyThe fish is named is from Greek for hook, referring to the small and simple hook in gonopodial appendix.