Answer:
Face with a tree, skin like the sea. A great beast I am. Yet vermin frightens me.
I have a powerful bite and live in rivers and swamps. People are often afraid of my big jaws. What am I?
The alphabet goes from A to Z. What goes from Z to A?
Even if my life is taken eight still remain.
It has 8 arms and lots of ink but can't write a word.
If itβs information you seek, come and see me. If itβs pairs of letters you need, I have consecutively three. What am I?