What rhymes with "oyster"?

Ah, I have it!

As you sit within your cloister,
Dipping sauce onto an oyster,
Think of all the years and eons
Needed to evolve these bivalve peons.

Stenzel says the O-stre-ina
Had a Late Trias begina.
And Newell says the Bi-val-via
Started in the mid Cam-bria.

But I say these learned Ph.D.'s,
Despite their much-deserved degrees,
Have strayed from truth in their great mission:
The oysters must be Hors-d'oeuvrician.

Andrew K. Rindsberg
Geological Survey of Alabama