Ⅰ. Introduction Sharks are one of the oldest living organisms on planet Earth, dating back more than 400 million years. These fish are characterized by their strong jaws and ferocity in catching prey, making them one of the most prominent predators in the oceans. Despite the negative image that many may have about sharks, there are positive aspects to preserving them in marine ecosystems. In this article, we will discuss comprehensive information about sharks, their types, geographical distribution, and behavior. Ⅱ. Types of sharks Sharks vary greatly in species, and there are many known species that differ in size and behavior. A. Great White Shark The great white shark is one of the most famous species, and is often used in documentaries. It is considered one of the largest sharks, as it can reach more than 6 meters in length. It is characterized by its ferocity and strength in hunting, making it a major predator in its environment. B. Small Shark On the contrary, we find that the whale shark is the largest shark in the world, as it exceeds 12 meters in length. But it is completely different from the white shark in terms of the nature of its food, as it feeds on plankton and marine microbes. This species is peaceful and does not pose a threat to humans. Ⅲ. Distribution of sharks in the oceans Sharks are found in all oceans, from shallow waters to the depths of the oceans. A. Natural habitats of sharks Sharks prefer to live in warm waters and areas rich in plankton, where they have a greater chance of finding food. Coral reefs are one of the primary habitats that host many species of sharks. B. Geographical distribution Sharks are distributed diversely around the world, as they are found in the Atlantic, Pacific and Indian Oceans, and are often seen near coasts and in tropical waters. Ⅳ. Shark behavior Sharks have distinctive behavioral characteristics that make them interesting marine organisms to study. A. Feeding habits Sharks are characterized by their reliance on the sense of touch and smell in searching for food, as they feed on a variety of prey ranging from small fish to marine mammals such as dolphins. B. Reproductive Behavior In terms of reproduction, sharks are creatures that have different ways of reproducing; some species lay eggs while others give birth live. Although reproduction occurs at a slow rate, some species show care for new generations, which contributes to their continued extinction. Understanding more about sharks contributes to enhancing protection and conservation efforts for the marine environment. As a society, we must be aware of the importance of these creatures in the ecosystem and work to protect them from the threats they face.