The depths and the shallows

 Then don't you worry.
You look so good almost everyday.
And on those days you don't...
You look quite dangerous.

My eyes have lives of their own.
People want me to control myself.
But there's nothing that can hold me back.
Then I go forward like a blind shark.

I bite down and take out a chunk from a larger predator.
I must try every kind of flesh there is.
I eat the strongest and the helpless with the same voracity.
I dive deep then surface into the shallows.

I am one of those unknown creatures.
My mind is one big ocean.
Don't fall in now.