title: Nassarius tritoniformis
text: # Nassarius tritoniformis
  
  Nassarius tritoniformis is a species of sea snail, a marine gastropod mollusc in the family Nassariidae, the nassa mud snails or dog whelks.
  
  ## Description
  
  The length of the shell varies between 15 mm and 25 mm
  
  ## Distribution
  
  This species occurs in the Atlantic Ocean off Angola and Senegal
  
  