 Consider a more elaborately described example (Turner 2000: ch.2; see also Skillings 2016: 877–879). Coral reefs are spectacular and beautiful parts of the living world, despite rapidly becoming a thing of the past due to the climate changes associated with global warming. At least at the ground level of common sense, they are often thought of as consisting of two chief components. The first are accretions of calcite deposits. The second are the small animals, polyps, which produce and grow on the deposits. (Coral polyps belong to the same Linnaean class as sea anemones, and to the same Linnaean phylum as jellyfish.) The polyps are indisputably biological individuals. But further, conservation biologists also often describe the coral reefs themselves, consisting of the polyps and the deposits considered together, as living things that can grow and die.