Red Flying Fox

Flying foxes look a lot like Siamese algae eaters at a glance, but a small spine at the base of the dorsal fin gives them away as a different genus entirely. That fin doubles as a warning flag: flared wide against another of its own kind, it's part of a territorial display that makes keeping more than one in a tank a bad idea.

Care level: Easy · Temperament: Semi-territorial with own kind · Max size: ~5" · Min tank: 30 gal · Diet: Herbivore, algae + wafers