Minute coiled worms with spiral shells. Head with a small number of feathery filter-feeding branches and a stalked operculum that blocks the shell.
About 2 mm.
Abundant everywhere, dotting most rocks in the shallow subtidal and in pools, as well as on countless invertebrate shells.
Two Oceans: A Guide to the Marine Life of Southern Africa (1994, 2016)
Several species, originally placed in the genus Spirorbis but now reclassified : they are only distinguishable using microscopic details.
F*CK FISH 