岩石芭蕉螺（学名：Siratus alabaster）为骨螺科岩芭蕉螺属下的一个种。

Siratus alabaster, or Alabaster Murex, is a predatory species of sea snail, a marine gastropod mollusk in the family Muricidae, often referred to as the murex or rock snails. It is found in the waters around Japan, ******, and down to the Philippines. The shell of the snail is distinctively large, fusiform, and often crisply white though it may also be ivory.