Ichthyosaurus (Latin scientific name: Ichthyosauria, from Greek ιχθυς, "fish", and σαυρος "lizard") is a large marine-dwelling reptile resembling fish and dolphin s. They lived during most of the Mesozoic era, first appearing about 0.25 billion years ago, slightly before the dinosaurs (0.23 billion years ago), and they disappeared about 90 million years ago, about 25 million years before the dinosaurs became extinct. Some ichthyosaurs are very small, but others are very large.

It is a marine reptile that lived during the Jurassic and Cretaceous periods, belonging to the ichthyosaur order, and was the top predator in the ocean at that time. The body is streamlined with a long and pointed snout, making it perfect for capturing fish and other marine creatures. The limbs have evolved into a shape similar to fish fins, allowing for rapid swimming in water. It can reach a length of several meters and was one of the largest predators in the ocean at that time. Fossils have been found in multiple regions around the world, providing valuable information for us to understand ancient marine ecosystems. Despite having the word 'fish' in their names, ichthyosaurs are actually reptiles with a close genetic relationship to dinosaurs.

Lantern Fish Dragon - Chanagaburu is a fictional monster that appears in popular games Monster Hunter 3 and Monster Hunter 3G under CAPCOM. A sea dragon monster resembling an Ankang fish, inhabiting rivers without forests, burying its body in the mud at the bottom of the river to ambush prey. Its water grass like tentacles and shiny lantern are its bait, and its huge mouth is always ready to swallow prey. Known as the 'underwater assassin'