Mytella strigata, recently seen in the news,

Solution

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.

Individual mussels have a diversity of external colour schemes from black, dark bluish, brown, grey, orange and (rarely) green.

These mussels spread like a carpet over the river bottoms and thus preventing prawns from grazing or burying themselves in the sediment.