Bacterium parahalum
Hosts: Spinomandrus rostrodontus
Size: 6μm
Bacterium parahalum is a descendant of a population of Bacterium phytovora ended in zone 18, specifically in A. lagosus’ range and eventually adapted to the brackish water and new hosts.
It takes up the same niche as its ancestor, hydrolyzing various polysaccharides to obtain nutrients within the digestive tract of S. rostrodontus, a relative of one of it previous host. It produces more chitinase than its ancestor due to its host sukapod rich diet.
Much like its ancestor, once its host dies, it swims in search of polyph matter, detritus, sukapods, etc and latches onto it, hoping to be picked up by another host. It doesn’t have any mechanisms to directly deal with the variable osmolarity of its environment and just conforms to whatever it is.