In contrast, both otters and the polar bear are much less adapted to ocean living. While the number of marine mammals is small compared to those found on land, their total biomass is large. They play important roles in maintaining marine ecosystems, especially through regulation of prey populations.
1 Scabies is an itchy, highly contagious skin disease caused by an infestation by the itch mite Sarcoptes scabiei. 2  Direct skin-to-skin contact is the mode of transmission. 3  A severe and relentless itch is the predominant symptom of scabies.
Scabies is contagious from person to person, and anyone can get it. The mites don't care if you're clean, dirty, rich, or poor. All they want is to live on or in the skin of a human being, and any human being will do.