Kraken (Speculative Evolution)

The Kraken, Giganticeras fluitarus, is a massive, floating ammonite from open seas, somewhat similar to a floating siphonophore jellyfish, in The New Dinosaurs: An Alternative Evolution. The only other creature that can attack it is a pelorus.

The ammonites of the Mesozoic seas were mostly swimming animals that moved freely about in the ocean waters chasing small swimming creatures that they caught with their tentacles. In Cretaceous times they developed into a number of different forms. There were those with heavy shells produced in irregular coils, that spent their time crawling along the seabed. Others were freely drifting animals, filtering microscopic food particles from the water using very fine tentacles. This second trend has reached a pinnacle with the modern kraken.