11 June 2007 - a water drop

Jay Scott : Daily Whale : archive : 2007 : 11 June 2007

When a water drop arrives
And spreads its shells wide
The oysters must be envious
For how would they find
A better smooth-layered pearl,
A safer place to hide?

clue:

Today I would change “better” to “richer”.

give me a clue so sweet and true