Eua zebrina is a tropical tree snail in the family Partulidae, and is endemic to the islands of Tutuila and Ofu in American Samoa. Eua zebrina varies in color, ranging from almost white to pale-brown, dark brown or purplish, with or without a zebra-like pattern of flecks and lines (Cowie and Cook 1999, pp. 29–30). Most shells have transverse patterning (distinct coloration perpendicular to whorls) with a more flared aperture (i.e., tapered or wide-rimmed shell lip) than species of the related genus Samoana (Cowie et al. 2017). Adult Eua zebrina shells usually vary between 0.7 and 0.8 inch (in) (18 to 21 millimeters [mm]) in height, and between 0.4 and 0.5 in (11 to 13 mm) in width (Cowie and Cook 1999 pp. 29–30). Snails in the family Partulidae are predominantly nocturnal arboreal herbivores that feed mainly on partially decayed and fresh plant material (Cowie 1992 pp. 167, 175; Murray et al. 1982, p. 324). Though Eua zebrina is considered to be primarily herbivorous, individuals have been observed eating other living nonpartulid snails (Cowie 1992, p. 175).