Giant string-like creature composed of "millions of interconnected clones" found off the coast of Australia

I'm currently re-discovering Jeff Van Der Meer's Area X / Southern Reach Trilogy via Audible, because I thought a familiar Weird Sci-Fi story about an invisible lifeform that kind of ambiently inhabits the world around us, changing things in imperceptible ways until it's too late, would be a relaxing respite from the chaotic news of COVID-19. […]