title: Nassarius irus
text: # Nassarius irus
  
  Nassarius irus is a species of sea snail, a marine gastropod mollusk in the family Nassariidae, the nassa mud snails or dog whelks.
  
  ## Description
  
  The length of the shell varies between 9.8 mm and 20 mm.
  
  ## Distribution
  
  This species occurs in the Indian Ocean off Madagascar.
  
  