is a fish that lived in the Late Cretaceous and whose fossils are common in the Upper Cretaceous Upper chalk in the Kent region of England. Fossils of this fish are usually preserved in chalk rocks, which were formed in marine environments, especially those sediments rich in calcareous microfossils and mudcrystals. These fish fossils are of great significance for paleontologists to study ancient marine ecosystems and fish evolution. Not only does it provide us with information about the morphology and structure of this fish, it also helps scientists understand the paleoenvironmental conditions in which they lived. By studying these fossils, scientists can reconstruct ancient marine ecosystems

It is an extinct marine cephalopod mollusk, belonging to the subclass ammonites, which lived from the Devonian to the end of the Cretaceous. It is known for its unique spiral shell, which usually presents complex patterns and designs, is made of calcium carbonate, and is divided into chambers separated by thin walls called partitions. The diameter of the ammonites varies from a few centimeters to more than two meters, and the shapes are varied, from tightly coiled forms to more open and loosely coiled forms. One of the most abundant and successful sea creatures of its time, it was an active predator, catching prey with its tentacles. The rapid evolution and wide distribution of ammonite make it an important standard fossil for stratigraphic division and correlation

It is an extinct giant shark, considered the largest shark in history and possibly the largest fish. Living during the Early Miocene to Pliocene period, approximately 23 to 2.6 million years ago. Fossil teeth are the main evidence for the existence of this ancient predator, and these teeth can grow up to 18 centimeters long, more than three times the size of modern great white shark teeth. It has a huge body size and a very strong biting force, making it the strongest known animal. The teeth are similar to modern great white sharks, with triangular, serrated edges and symmetry, but larger, thicker, more evenly spaced serrations, and a darker, V-shaped area near the root of the teeth.