still considered a fish, these guys breath air. i always thought that would qualify the animal as a mammal. because of this trait, they keep to the surface of fresh water. and while they feed on fish, their stomping grounds give them access to birds which they also sometimes eat. so they breath air and they eat birds. that’s a hell of a fish! this proximity to the the surface also exposes them to humans too though, and we like to hunt everything apparently. strangers still, their tongues are kind of bony and have their own teeth! crazy. arapaima gigas in moleskine.