Penguin tetras (Thayeria) are well known aquarium fishes. Of the scientifically accepted four species (T. boehlkei, T. ifati, T. obliqua, T. tapajonica) T. boehlkei is always on offer in the ornamental fish trade. Almost all of them are offsprings, although the species is widely distributed in South America (Peru, Ecuador, Brazil and Bolivia).
