Sense Sonnet - Pumper

Pufferfish

I am a pufferfish, I am.
I can puff up like a balloon,
So some wanna have lunch can't cram
Me down its tummy, overstrewn.
But if the predator persists,
As I inflate, my spikes stick out.
If ingested, I make some twists.
The predator's choked up - no doubt!
But humans are the sneaky kind,
Grabbing with hooks and nets and stuff.
I'm delicacy to eat they find.
It matters not how much I puff.

So humans, catch me if you will,
And eat me and get deathly ill.