Pinctada imbricata
Pinctada imbricata
Hi,
Pinctada radiata is found throughout the Pacific (including the Indian Ocean and the Red Sea) from the Persian Gulf (Bahrain) to New South Wales. The term is often used synonymous with pinctada vulgaris and confused with pinctada imbricata of the Atlantic ocean, although pearl collectors tend to use it more specifically for the pink-nacred pinctada varieties that lives around undersea freshwater vents or river estuaries. The only real difference to pinctada radiata is its far lower saline tolerance and its tendency to produce pearls in the orange/pink/lavender range. The p. imbricata was frequently used as a donor in early transgrafting experiments at Lake Biwa. The most extensive beds of the pink-nacred pinctada varieties are around the Ganges river delta on the coast of Bangladesh in particular around Cittagong. If you know German, I recommend Elisabeth Strack's tome called Perlen.
Zeide G. Erskine