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Sea silk is a fine, rare, and valuable fabric produced from the long silky threads secreted by several bivalve molluscs, particularly Pinna nobilis, to attach themselves to the sea bed. [33] Procopius , writing on the Persian wars circa 550 CE , "stated that the five hereditary satraps (governors) of Armenia who received their insignia from the ...
Some species are collected and eaten locally but are rarely bought and sold. A few species of molluscs are not commonly eaten now, but were eaten in historical or prehistoric times. The list is divided into marine and non-marine (terrestrial and freshwater) species, and within those divisions, the lists are primarily arranged taxonomically , so ...
In China and Japan, where it is native, the mussels are found in intertidal zones with densities up to 2500 individuals per square metre. In Australia, as an invasive species , they are found from 0.5 to 4 metres ( 1 + 1 ⁄ 2 to 13 feet) below the surface of the water in slightly higher densities.
Mussel (/ ˈ m ʌ s ə l /) is the common name used for members of several families of bivalve molluscs, from saltwater and freshwater habitats. These groups have in common a shell whose outline is elongated and asymmetrical compared with other edible clams, which are often more or less rounded or oval.
The adductor muscles are the main muscular system in bivalve mollusks (e.g. in clams, scallops, mussels, oysters, etc.). In many parts of the world, when people eat scallops, the adductor muscles are the only part of the animal which is eaten. Adductor muscles leave noticeable scars or marks on the interior of the shell's valves.
The reason mussels live in such large colonies (also called banks) is because it gives the males a much greater chance of fertilizing eggs. After the larvae have developed freely floating as plankton for about four weeks, they attach themselves to stones, stakes, shill, sand and other mussels with byssus threads.
A fossil reveals how a now-extinct species of dugong was swimming in the sea about 15 million years ago when it was preyed upon by a crocodile and a tiger shark.
Perna perna, the brown mussel, is an economically important mussel, a bivalve mollusc belonging to the family Mytilidae.It is harvested as a food source but is also known to harbor toxins and cause damage to marine structures.