▁Category : P alk ▁Stra it ▁Category : Transport ▁in ▁R ames war am ▁Category : P laces ▁in ▁the ▁Ram ay ana ▁Category : P ur ana ▁tem ples ▁of ▁V ish nu ▁Category : R am ay ana ▁Category : S ho als ▁of ▁Asia ▁Category : Tom bol os <0x0A> </s> ▁P inct ada ▁alb ina ▁is ▁a ▁species ▁of ▁p ear l ▁o yst er ▁of ▁the ▁genus ▁P inct ada , ▁known ▁as ▁the ▁sh arks ▁bay ▁shell . ▁Another ▁common ▁name ▁is ▁the ▁A raf ura ▁shell . ▁It ▁is ▁called ▁the ▁" Am ami ▁g ai " ▁in ▁Japan . ▁ ▁P inct ada ▁P inct ada ▁alb ina ▁belongs ▁to ▁the ▁genus ▁P inct ada . ▁These ▁are ▁salt water ▁o yst ers , ▁marine ▁b ival ve ▁m oll us ks ▁of ▁the ▁genus ▁P inct ada ▁in ▁the ▁family ▁P ter i idae . ▁They ▁have ▁a ▁strong ▁inner ▁shell ▁layer ▁composed ▁of ▁n acre , ▁also ▁known ▁as ▁mother ▁of ▁p ear l . ▁Pear l ▁o yst ers ▁are ▁not ▁closely ▁related ▁to ▁the ▁ed ible ▁o yst ers ▁of ▁family ▁Ost re idae , ▁and ▁they ▁are ▁also ▁not ▁closely ▁related ▁to ▁the ▁fresh water ▁p ear l ▁muss els ▁of ▁the ▁families ▁Union idae ▁and ▁Mar gar it ifer idae . ▁Like ▁other ▁members ▁of ▁the ▁genus ▁P inct ada , ▁they ▁share ▁the ▁phys i ological ▁properties ▁that ▁can ▁lead ▁to ▁the ▁production ▁of ▁large ▁p ear ls