Usually, strictly benthic fish are negatively buoyant, while benthopelagic fish are neutrally buoyant. Compared to buoyant flow, the neutrally buoyant flow shows completely different behaviour. When underwater, a diver often needs to be neutrally buoyant and neither sink nor rise. This fat also makes large toothfish neutrally buoyant. SURTASS is a linear array of deployed on a tow cable and neutrally buoyant. Certain other progestins act similarly in this assay, whereas progesterone acts neutrally. This assumption may be justifiable if the sites can be assumed to be evolving neutrally. This is considered as neutrally stable kinked crack growth. One could interpret these experiences either veridically, neutrally or as delusions. As neutrally stated, the decision becomes an informed choice. Certain other progestins are also active in this assay, whereas progesterone acts neutrally. Device vendors can establish policies for managing applications, but they, too, must be applied neutrally.