JAPANESE SEAWEED DIGESTION. “Humans in Japan possess gut microbiomes that are similar to those found in North Americans, where “similar” means “possessing the same species composition, as measured by rRNA analysis.” However, unlike North American gut microbiomes, Japanese gut microbiomes can digest seaweed because of genes acquired through horizontal gene transfer from a marine microbe ( Zobellia galactanivorans ) that provide porphyranases, agarases and associated proteins useful in the digestion of porphyran from marine red algae.” (Hugely important finding).
https://standardsingenomics.biomedcentral.com/articles/10.1186/s40793-016-0180-8