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.
Sea urchins, parrot fish, limpets (mollusks), and chitons (mollusks), feed on coralline algae. In the temperate Mediterranean sea, coralline algae are the main builders of a typical algal reef, the CoralligÃ¨ne (coralligenous). Many are typically encrusting and rock-like, found in marine waters all over the world.