short story: the most valuable whale

[silky]

a whale is born

she lives an enjoyable life for a while

she reads in the newspaper that whales have been assigned a carbon price, but it's only a passing thought

5 years later, she observes that she is the only remaining whale; and is thus the worlds most valuable whale. she ponders what she should do; should she sell her life? to who? for how much? or is there an alternative?