The pale translucent shrimp-like bodies you may see lying on the bottom now and then are not dead shrimp, but exoskeletons. Shrimp are crustaceans. This means that they have their skeletons on the outside rather than on the inside. As the shrimp grows, it replaces it from time to time. After the old exoskeleton has been shed, the new one expands and hardens. It has been observed that a shrimp may molt once or twice a month in a normal environment. If a shrimp dies, the others will eat it, quickly returning the nutrients back to the system. The bacteria in the EcoSphere will also help decompose it within a day or so.