Haliotis asinina, common name the ass's-ear abalone, is a fairly large species of sea snail, a tropical gastropod mollusk in the family Haliotidae, the abalone, also known as ormers or pāua. Both the common name and the scientific name are based on the shape of the shell, which is long, narrow and curved, resembling the shape of a donkey's ear.

Shell description The maximum shell length of this species is up to 120 mm (4+3⁄4 in), but it more commonly grows up to about 90 mm (3+1⁄2 in). The shell of Haliotis asinina has a distinctly elongated contour, in clear resemblance to a donkey ear, hence the common name. Its outer surface is smooth and almost totally covered by the mantle in life, making encrustations of other animals (such as barnacles) quite uncommon in comparison to other abalone. The shell of H. asinina presents 5 to 7 ovate open holes on the left side of the body whorl. These holes collectively make up what is known as the selenizone which form as the shell grows. Its spire is somewhat conspicuous, with a mostly posterior apex. The color may variate between green olive or brown externally, with distinct roughly triangular patches. As is the case in many other abalone, the interior surface of the shell is strongly iridescent, with shades of pink and green.