Trivirostra hyalina is a species of small sea snail, a marine gastropod mollusk in the family Triviidae, the false cowries or trivias.

[2] The length of the shell attains 4 mm.

Individuals can grow up to 5.5 mm in length.

[2] This marine species occurs off Oceania.

[2] In Australia, they were found in New South Wales and Western Australia.