"Mactra glauca " is a suspension feeder which feeds on phytoplankton.
2.
"Mactra glauca " is found on the continental shelf, from the south of England to the Mediterranean and West Africa.
3.
"Mactra chinensis " is found living in sandy substrates in shallow marine habitats in Vietnam, Korea, Mainland China and Taiwan.
4.
The other two, the British Shell tanker " Mactra " and the Norwegian " Kong Haakon VII " were damaged heavily, but remained afloat.
5.
Most shell rings in the United States consist primarily of sea snails, surf clams ( " Mactra veneriformes " ), and Japanese littleneck clams ( " Tapes japonica " ).
6.
In Argentina, the larvae settle on shells such as those of the sea snail " Adelomelon brasiliana " and the clams " Mactra isabelleana " and " Tagelus plebeius ".
7.
The word " trough " in the common name refers to the fact that all " Mactra " shells have a large ligamental pit at the hinge line, which in life contains a large internal ligament.
8.
According to the report of the Japanese zoologist Kakichi Mitsukuri, who conducted a significant amount of research at Hattori's farm in the late 19th and early 20th centuries, the main food supplied to the turtles was crushed bivalve mollusks, " Mactra veneriformis " ( ??????, " shiofuki ", in Japanese ), from Tokyo Bay.
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