title: Acanthopolymastia
text: # Acanthopolymastia
  
  Acanthopolymastia is a small genus of demosponges belonging to the family Polymastiidae. It has three describe species. These small, bristly, cushion-shaped sponges are only known from deep-sea sites (to a depth of 3400 m) in the southern oceans.
  
  ## Species
  
  Species include:
  
  * Acanthopolymastia acanthoxa (Koltun, 1964)
  * Acanthopolymastia bathamae Kelly-Borges & Bergquist, 1997
  * Acanthopolymastia pisiformis Kelly-Borges & Bergquist, 1997
  