Answer:
I am a protector. I sit on a bridge. One person can see right through me, while others wonder what I hide. What am I?
Fatherless and Motherless, born without sin. Roared when it entered the world, And never spoke again.
In my life I must bare my bloodline I must share.
Though desert men once called me God today men call me mad. For I wag my tail when I am angry. And growl when I am glad.
You will always find me in the past. I can be created in the present, but the future can never taint me. What am I?
you hold my tail while I fish for you