The cleaner crastrum replaced its ancestor the surfacestrum. It lived for a very long time on and back of the many aquatic creatures in Jujubee Ocean and its surround coastlines. It did just fine until other creatures hitches a ride too and used up precious space. To solve this problem it now will kick off rival hitchhiker species. It has evolved poisonous spikes on the each of their 7-12 "legs". When it comes in contact with an enemy species other than the host it will inject its poison into them. This normally will not kill the species it injects but it will cause them to loosen their grip on the host due to the intense pain. The main species it clean off are the parasite crastrum and the urstar. However the hitchhiker hydroglobes are immune to this being flora and will stick to them. Thus they avoid creatures with any hitchhiker hydroglobes on them. They also have developed a protective outer shell which can still photosynthesize. This keeps it from being injured by predators or they spines of the parasite crastrum. They still in times of trouble escape in a massive cloud, mainly when their host is going to be eaten or is in danger. Since they clean off their hosts from parasites like parasite crastrum they are sought after by many aquatic creatures, mainly the brute snark. Brute snarks with many cleaner crastrum tend to be more attractive to females as well.