Vernix caseosa is a protective substance that covers the surface of the skin of the fetus during the sixth and seventh month. In Latin, what does caseosa mean?
Annelids are found worldwide in all types of habitats, especially oceanic waters, fresh waters, and damp soils. Most polychaetes live in the ocean, where they either float, burrow, wander on the bottom, or live in tubes they construct; their colours range from brilliant to dull, and some species can produce light. The feather duster (Manayunkia speciosa) inhabits the Great Lakes and some rivers of the United States.
In Australia, Blue Swimmer Crabs inhabit coastal waters from the south coast of New South Wales, up and around to Perth in Western Australia. They live in a wide range of inshore and continental shelf areas, including sandy, muddy or algal and seagrass habitats from the intertidal zone to at least 50 metres in depth.