Nemalion

Nemalion is a genus of red algae that contains approximately ten species, including "N. helminthoides". Its members are known by a number of common names. It is the source of the subclass name "Nemaliophycidae".
Species.
As of 2017, the species accepted taxonomically are:
Description.
Simple multiaxial frond, with a soft and gelatinous core.
Habitat.
Marine, mainly littoral.