Calpurnus verrucosus - Toe Nail Cowry

Calpurnus verrucosus on its host. I notice one of the images has the shell near some clear gelatinous blobs; eggs perhaps? Videoed at at an onshore reef at low tide. They were common but not abundant; I saw 10 or so within a field of soft corals although many more were probably hidden in and under the folds.