While dinosaurs ruled the land during the Late Jurassic, the ammonite genus Kranaosphinctes could be found flourishing in the oceans.

Ammonites were a type of cephalopod — the taxonomic class that includes today's nautilus, octopus, and squid. Much like a submarine, a♔mmonites employed gas- and liquid- filled chambers to regulate their position in the water column. The animal itself lived only in the outermost compartment, employing its tubular siphuncle to connect its chamber🧸s along the shell's ventral surface.