Kraken appear to be solitary, asexual creatures that reproduce by dividing themselves, much in the same fashion as amoebas or single-celled organisms. A Kraken tears off a piece of itself and flings it at a world (ideally airless and devoid of life) to create a hatchling which then burrows into the surface of the planetoid, feeding off the rock for decades or even centuries before emerging as a fledgling Kraken and flinging itself into space to hunt (another reason for choosing small asteroids or rocks with little gravity to overcome for the young). There is speculation that Kraken might mate, and some process of fertilisation is required for these hatchlings, but so far there has been no proof, or conceivable way to tell a male Kraken from a female Kraken, if such things do indeed exist.