The Trivias of the Triviidae Family are gastropod mollusks that have small shells that are globose or oval in shape. They closely resemble Cowries in their structure with a low or internal spire and an aperture that runs the length of most family members that has an outer lip that folds inward like a Cowry. Trivia Shells are not particularly striking in color or pattern. Some will display color blotches, but never bands. The shells may be smooth or marked with ribs that cross the top of the body whorl or stop leaving a gap or they will continue to the aperture generating dentition (teeth) along both sides. Unlike cowries, the surface is silky, not shiny.

Trivias are found attached to and under rocks, as-well-as over and within sand and mud substrate from the intertidal zone to depths up to 70 m (230 feet). They are carnivores, feeding on ascidians (Sea Squirts). In turn they are preyed upon by shore birds, crabs, fish, and predatory mollusks. They are found worldwide, in tropical and temperate seas. There are more than three hundred fifty global species in the Triviidae Family of which eight are found in the coastal waters of the Baja.