Pearl Maker
This page is the CodyCross answer for the clue below from Science Lab, Group 315, Puzzle 2 (Measurements).
Question is: Pearl Maker
and the answer is: OYSTER
Word Meaning:
OYSTER — Any of certain marine bivalve mollusks, especially those of the family Ostreidae (the true oysters), usually found adhering to rocks or other fixed objects in shallow water along the seacoasts, or in brackish water in the mouth of rivers.
Definitions from Wiktionary.