The wide frame of C. lyra optimizes the chances for successful fertilization.

Small green berries form after successful fertilization.

Copulation time is short, ranging from 30 seconds to five minutes, but the male may mount her repeatedly to ensure successful fertilization.

Densities at all but one site are below or within the minimum range for successful fertilization.

As soon as the bag is removed, the calyxes begin to swell with seed, indicating successful fertilization.

When successful fertilization is achieved, the ookinetes generate oocysts that arrest early in development and fail to enter sporogony.

Therefore, aggregations of adult male and female abalone are necessary for successful fertilization to occur.