Which of the following are likely to be present in deep sea water?

Archaebacteria flourish in hot springs and deep sea hypothermal vents. Eubacteria are true bacteria, characterised by the presence or rigid cell wall and if motile a flagellum. Most fungi are heterotrophic and absorb soluble organic matter from dead substrates and hence are called saprophyte. The cyanobacteria have chlorophyll-a similar to green plants and are photosynthetic autotrophs.