It was bown somewhere in the middle of the Pacific Ocean. It was not life like the Earth has never known. If it had been seen by a human, they would have thought it strange that a swirling bit of water persisted. But this small eddy continued to swirl, and it was definitely alive. Vortex, as it would become to be known, was also growing.

Strength

Traditional weapons have no effect on it.
If it gets big enough, it will be able to suck in the largest of human-built ships.

Strength Source
Innate ability.