Aphanisma is a monotypic genus which contains the sole species Aphanisma blitoides, a rare annual plant known by the common names San Diego coastalcreeper or simply aphanisma. This is a beach-dwelling plant native to the coastline of Baja California and southern California, including the Channel Islands. It is a succulent saline-adapted plant found in sand or scrub at the immediate coastline. It has many thin, sprawling stems, few reduced green leaves, and tiny flowers.