Habitat: It lives in crevices of rocks or corals. Distribution: This species has been reported from several localities in the Caribbean: Virgin Islands, Panama. Natural History Notes: Its common name comes from the various shape this bivalve can have, depending on shape and the size of the habitat it inhabits. Habitats can be crevices of rocks or corals. Depth: 0-24 m Characteristics: The anterior end of the animal is short and rounded, whereas the posterior end is long and angulate. The shell is white.