Death of a Dolphin; Poem of Nature

A super nova in Dolphinus
Foretold of the coming plight
A fall hurricane unleashed
Toxins from toxic sights

Now the dolphins are dying
Their dead sounds the warning cry
Has some of the chrome leached to the waters? 
Take notice: those who live nigh

Avoid for a time all swimming
And soak not too long in the tub
And even drinking the water
If it comes from downstream of the flub