''Plenaster'' is a

monotypic In biology, a monotypic taxon is a taxonomic group (taxon) that contains only one immediately subordinate taxon. A monotypic species is one that does not include subspecies or smaller, infraspecific taxa. In the case of genera, the term "unisp ...

genus of sponges in the family Stelligeridae. ''Plenaster craigi'' is the sole species. It lives on rocks on the

Pacific Ocean The Pacific Ocean is the largest and deepest of Earth's five Borders of the oceans, oceanic divisions. It extends from the Arctic Ocean in the north to the Southern Ocean, or, depending on the definition, to Antarctica in the south, and is ...

seafloor. ''Plenaster craigi'' have been named after the star like skeletal spicules inside their bodies.

References

{{Taxonbar, from1=Q41157279, from2=Q41167224 Heteroscleromorpha Taxa described in 2017