Neritina pulligera (Military Helmet Snail, Dusky Nerite) is a species of freshwater snail, a gastropod mollusk in the family Neritidae. This species is widely distributed throughout the Indo-Pacific region. Neritina pulligera is found in fast-flowing freshwater streams and rivers with rocky substrates. Throughout its range this species inhabits rivers and streams in close proximity to the tidal influence of the ocean, and so it can be found in brackish waters as well.
Neritina pulligera is another great algae eating snail which is a great addition to planted tanks. Their shells are black. They have more a military helmet shape than tiger or zebra nerites.