Mioawateria vivens is a species of sea snail, a marine gastropod mollusk in the family Raphitomidae.

[1] The length of the shell attains 12 mm.

[1] Compared to the rest of the genus, M. vivens has smaller dimensions (up to 6.4 mm vs. 8.2–9.9 mm in length), strongly shouldered whorls well above mid-whorl and absence of somewhat “crisp” axials on the sutural ramp.

[2] This marine species occurs in the Gulf of Aden.

Vivens is Latin for "living", alluding to the fact that the new species is morphologically so close to the Miocene-Pliocene Mioawateria personata Powell, 1942 that observers speculate that it actually represents a living offshoot of the New Zealand species.