sub- + seafloor
subseafloor (not comparable)
- Beneath the seafloor.
2015 July 17, “Zygomycetes in Vesicular Basanites from Vesteris Seamount, Greenland Basin – A New Type of Cryptoendolithic Fungi”, in PLOS ONE[1], →DOI:Zygomycetes had not been reported from subseafloor basalt previously.