Seal vs. Shark

From Mollie's review of a rare theatrical treat:

What followed was a fascinating mix of processional and site-specific theatre, postmodern dance, metatheatrical audience interaction, boldly avant-garde prop use and highly unorthodox storytelling....

"I hope the end will come soon," another spectator ventured. The Seal approached and whispered in my ear, "The play will end when we start the ending." Then he slithered off to crouch inside an overturned wicker table....

Eventually there was a snarling showdown between Shark and Seal, with the Seal, on his belly in the grass, doing most of the snarling (as the Fish ran around, shouting, "Glub! Glub! Glub!"). The younger, startled Shark protested, "You're a Seal! Seals are nice!" "We're not friends yet," the Seal reminded him, and us. "We're still mean friends." Then he raised himself to look the Shark in the eye and growled, "If you don't start being good, I will kill you."