Aldrovandia gracilis a genus of Aldrovandia in the Halosauridae family (eel-shaped fishes found only at great ocean depths), within the Notacanthiformes order, and under the Actinopterygii class.
Aldrovandia Halosauridae Notacanthiformes Actinopterygii Halosaurs are eel-shaped fishes found only at great ocean depths. 
