The saberfin killie (Terranatos dolichopterus) is a species of killifish from the family Rivulidae endemic to the Orinoco River basin of Venezuela.

This annual killifish grows to 4 cm (1.6 in) in total length.

This species is the only known member of its genus.

This species is also found in the aquarium trade.

This Rivulidae article is a stub.