African Dwarf Frog (Hymenochirus sp.)

African dwarf frogs are essentially blind by amphibian standards, tracking food by smell and the vibrations of a lateral line system borrowed straight from fish biology — practically harmless in a peaceful community tank, but stone-cold determined once it catches a whiff of food nearby. Unlike its much larger, much more aggressive cousin the African clawed frog, this species has webbed front feet and genuinely can't hurt anything sharing the tank. Give it slow-sinking food dropped close by and access to the surface for air, and it'll spend its life pottering around the substrate, unbothered by tankmates twice its size.

Care level: Easy · Temperament: Peaceful · Max size: ~1.5" · Min tank: 10 gal · Diet: Carnivore, small sinking pellets/frozen foods