noun, noun which may take the genitive case particle 'no'
sponges; Porifera
Scientific term for the animal phylum Porifera; used in biology and taxonomy. In everyday contexts, 海綿 (かいめん) alone often refers to sponges.
海綿動物は多細胞生物の一群である。
Sponges are a group of multicellular organisms.
海綿動物の骨
The skeleton of sponges is used as cosmetic sponges.