A scene showing the seafloor during the late Bathonian stage of the Middle Jurassic. The seafloor is shown carpeted with two types of crinoids (sea feathers); The taller stalked crinoids (isocrinus) and the stalk-less comatulid crinoids (eocomatula). Eocomatula crinoids were able to swim as shown in this image. Also on the seafloor are some brachiopod shells, a spiny sea urchin (acrosalenia).