Mytella strigata

Oct. 8, 2023

Recently, the Southern Bench of the National Green Tribunal (NGT) has asked the Fisheries Department and the Tamil Nadu State Wetland Authority to file a detailed report on the removal of invasive mussel species Mytella strigata from Ennore-Pulicat wetland.

About Mytella strigata  :

  • It is a moderately large and symmetrical shelled mussel.
  • It is generally observed in the middle intertidal and subtidal waters of estuaries and near coastal environments.
  • These mussels attach themselves to surfaces using byssus threads.
  • Appearance: 
    • Individual mussels have a diversity of external colour schemes from black, dark bluish, brown, grey, orange and (rarely) green
    • The species can also have a range of external shell patterns from zig zags, spots or concentric bands.
  • It can form dense clusters that colonise hard substrates or occupy epibenthic habitats, including other mussel species. 
  • It is usually present on both the Atlantic and Pacific coasts of tropical South and Central America.
  • It has spread to Taiwan, the Philippines, Singapore, the Gulf of Thailand, west coast of India and the south-eastern United States.
  • Threats: These mussels spread like a carpet over the river bottoms and thus preventing prawns from grazing or burying themselves in the sediment.