Elasmosaurus is a notable member of the plesiosaur family, distinguished by its extraordinarily long neck, which comprised nearly half of its body length. Inhabiting the Late Cretaceous period's oceans, it feature a small head equipped with sharp teeth, suitable for snatching fish and cephalopods. With four large flippers for propulsion, it is not built for speed but is likely an adept ambush predator in shallow marine waters. Its distinct morphology, highlighted by the elongated neck and robust body, makes Elasmosaurus a standout amongst Mesozoic marine reptiles.