The Elasmosaurus is an aquatic creature in Beasts of Bermuda. It is a piscivore and primarily roams the Ocean, consuming fish. This creature, however, is hardly defenseless, and can pose significant threat to any terrestrial creatures who dare enter the water. Creating the Elasmosaurus and transforming it into a practical creature for gameplay was a difficult endeavor, mostly due to its long neck. A development blog post was created on the topic here. It is currently the only creature to have an auto-aim mechanic with its bite attack, and uses a similar mechanic to eat carcasses or grab smaller prey.
The Elasmosaurus' primary attack is a bite. It deals light damage, on par with raptors or other smaller creatures. It can strike swiftly from afar due to its long neck. Its head is vulnerable to damage, so caution on when to bite must be taken if the prey is capable of fighting back. In the absence of more threatening targets, the primary attack will auto-target nearby fish and allow the Elasmosaurus to effortlessly grab them out of the ocean for consumption.
The Elasmosaurus' secondary attack is a grab. It is capable of grabbing smaller creatures right off the shoreline and dragging them down into the water. For particularly small prey such as velociraptors, the Elasmosaurus can consume them whole by executing its secondary attack once again while the prey is in its jaws. If the creature is relatively large such as a Pachycephalosaurus or a Utahraptor, it will thrash just as the Mosasaurus does. Food is granted upon consumption of prey whole.
The relationship between Mosasaurus and Elasmosaurus was one of particular focus. The Elasmosaurus is capable of biting the Mosasaurus while residing safely outside range of the Mosasaurus' grab attack. It is also immune to grabbing on its head and neck, and must be grabbed by the torso. The Elasmosaurus is faster than the Mosasaurus and has more stamina. Two or more Elasmosaurus are a threat to a Mosasaurus typically.