Answer:
I am a type of weapon for SCI-FI characters
I am in the middle of water but am not an island.
What gets bigger when more is taken away?
The 8 of us go forth and back to protect our king from a foes attack
When I am caught I am thrown away. When I escape you itch all day.
An open ended barrel, it is shaped like a hive. It is filled with the flesh, and the flesh is alive!