Ephydatia
noun
Eph·y·da·tia
ˌefəˈdāsh(ē)ə
: a common genus of freshwater encrusting sponges (family Spongillidae) often bright green from included symbiotic algae
Word History
Etymology
New Latin, from Greek, feminine of ephydatios of the water, in the water, from epi- + hydat-, hydōr water