Answer:
I am the ultimate killing machine used not once but TWICE I can be made by humans.
I am the only word that looks the same when spelled upside down.
I have a head, tail, but no arms and legs. What am I?
I am in the middle of water but am not an island.
I am an insect and the first part of my name is the name of another insect. What am I?
Often cooked as fillet, this meat comes from an animal that swims underwater.