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.
Coral reefs live in warm, tropical sea water all over the world. Many reefs are found in the Caribbean Sea and South Pacific. Large coral colonies live off the coast of the Florida Keys, Hawaii and Australia.everal types of algae live in coral reefs. They all provide food for other organisms in the reef. Blue-green algae process nitrogen in the reef ecosystem so that other organisms can use it. Coralline algae, a type of red algae, produce calcium carbonate which provides structure to the reef.