Princeton's WordNet(3.00 / 1 vote)Rate this definition: 1  opacity(noun) the phenomenon of not permitting the passage of electromagnetic radiation. 2  opacity, opaqueness(noun) incomprehensibility resulting from obscurity of meaning.
The Oystercatcher is a species of bird that lives around Europe and Asia. They usually eat shellfishes that are found on beaches and mud.The Eurasian Oystercatcher uses its sharp bill to open the shells of oysters and mussels.It cuts the muscle between the two halves of the shell together, or it crashes the shell against a rock and eats the oyster inside.ith bills like that, oystercatchers are dangerous opponents for other birds. They can fight off predators, and often raid other birds to steal their catches. They attack other birds at an average of five-minute intervals during low tide. They get as much as 60% of their food by theft.
From Wikipedia, the free encyclopedia. The Pacific oyster, Japanese oyster or Miyagi oyster (Crassostrea gigas), is an oyster native to the Pacific coast of Asia. It has become an introduced species in North America, Australia, Europe, and New Zealand.acific oyster broodstock in hatcheries are kept in optimum conditions so the production of large amounts of high quality eggs and sperm can be achieved. Pacific oyster females are very fecund, and individuals of 70-100g live weight can produce 50-80 million eggs in a single spawn.