A specialization of living thing. Each instance of organism is a biological living object (BLO) that is a whole, and not part of some other BLO. Most instances of organism are capable of existing and reproducing while physically separate from other organisms (with allowances for eating and mating). Abnormal BLOs which are nonetheless considered to be instances of organism include instances of virus, as well as sterile hybrids and colony organisms, like those in slime molds or the instances of Portuguese man-of-war.