The swarm eater is mainly native to the shallow regions of the large inland lake of Yavon. However, individual specimens can also be found in other areas of the long river. When fully grown, these fish reach a length of about one step. They are characterised by a green-brown striped upper side and a silvery underside. The tail fin is slightly rounded at the top.
The main food source of these animals are small schooling fish. This is where the name comes from.