Appearance
"Sphondylus varius" is the largest of the spiny oysters, reaching a maximum size of about 20 cm. Aside from the size, the shell is easily recognisable because its adult part is white, but a colourful prodissoconch is clearly visible at the apical end.
Distribution
This species can be found in the Indo-Pacific Ocean and off Australia, China, the Philippines, Japan, and Taiwan.
Habitat
It lives at a depths of 30 m, and like most bivalves, is a filter-feeder, using plankton as a food source.References:
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