The central figures are a large ichthyosaur biting into the long neck of a plesiosaur. A rotting basking shark may also resemble a decomposing plesiosaur. The following is a list of geologic formations that have produced plesiosaur fossils. Some plesiosaur fossils show pathologies, the result of illness or old age. Futabasaurus is a genus of plesiosaur from the Late Cretaceous of Fukushima, Japan. Anning discovered yet another important and nearly complete plesiosaur skeleton in 1830. Marine vertebrates have also been found including ichthyosaurus and plesiosaur. Among the marine reptiles is the plesiosaur "Sulcusuchus erraini" of the family Polycotylidae. The remains of a plesiosaur "(Plesiosaurus robustus)" were also found on this peninsula. They constructed an animatronic model of a plesiosaur, calling it "Lucy". It is probably the best preserved specimen of a plesiosaur yet discovered. The specimen is actually a very large plesiosaur, possibly reaching in length. Styxosaurus is a genus of plesiosaur of the family Elasmosauridae. Compared to other plesiosaur genera, "Plesiosaurus" has a small head. IGN wrote that it was "loosely based on a plesiosaur, crossed with a tortoise".