Varieties of eel
Common eel, Muraena anguilla, gulper, Saccopharynx flagellum, electric eel, Gymnotus electricus, smallhead, Leptocephalus morrisii, sand eel, Ammodytes tobianus, cusk eel, Ophidium barbatum
Electric eel, torpedo, batfish, cowfish and sargassum fish
Electric eel, Electrophorus electricus 1, eyed electric ray, Torpedo torpedo 2, Brazilian batfish, Ogcocephalus vespertilio 3, longhorn cowfish, Lactoria cornuta 4, and sargassum fish