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"Red-bellied Piranha (Pygocentrus nattereri)" by Cliff1066™ via Flickr, Creative Commons Attribution.
"Gasteropelecus sternicla" by Nat Tarbox via Flickr, Creative Commons Attribution.
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Fam. AcestrorhynchidaeFam. AlestidaeFam. AnostomidaeFam. CharacidaeFam. ChilodontidaeFam. CtenoluciidaeFam. DistichodontidaeFam. ErythrinidaeFam. Freshwater hatchetfish, GasteropelecidaeFam. HemiodontidaeFam. HepsetidaeFam. LebiasinidaeFam. Prochilodontidae
Cobitoidea (Add)Cyprinoidea (Add)Paedocypridoidea (Add)
Fam. Apteronotidae (Add)Fam. Gymnotidae (Add)Fam. Hypopomidae (Add)Fam. Rhamphichthyidae (Add)Fam. Sternopygidae (Add)
Fam. CallichthyidaeFam. LoricariidaeFam. Mochokidae (Add)Fam. Shark catfish, PangasiidaeFam. PimelodidaeFam. Eeltail catfish, Plotosidae