reminds me of https://en.wikipedia.org/wiki/Archaea https://en.wikipedia.org/wiki/Archaea Although these archaea can be present in extremely high numbers (up t

reminds me of https://en.wikipedia.org/wiki/Archaea https://en.wikipedia.org/wiki/Archaea Although these archaea can be present in extremely high numbers (up to 40% of the microbial biomass), almost none of these species have been isolated and studied in pure culture.