1) Malacopterygian 2) Order ostariophysi 3) Soft-finned fish 
Ostariophysi is the second-largest superorder of fish. Members of this superorder are called ostariophysians. This diverse group contains almost 8,000 species, about 28% of known fish species in the world and 68% of freshwater species, and are present on all major continents except Antarctica. They have a number of common characteristics such as a...
[n] - in some classifications considered a superorder comprising the Cypriniformes and the Siluriformes
order Ostariophysi noun in some classifications considered a superorder comprising the Cypriniformes and the Siluriformes