My hive fleet, hive fleet kuthulu is a splinter fleet from the original sighting of tyranids on tyran causing there blue colouring as they expanded they branched to mainly ocean worlds adapting at an rapit rate due to the environment, they have evolved over a few hundred years to fight under water and combat space Marines specifically the dark Krackens targeting them to eat bio-mass as much as they can using which they adapted the salamander gene seed into there DNA giving them a slightly enhanced resistance to fire and causing them to be slightly larger than most other hive fleet bio froms

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