The term "River Shark" typically refers to a group of shark species that inhabit freshwater rivers and estuaries. One notable example is the Bull Shark, which is known for its ability to thrive in both saltwater and freshwater environments. These sharks can travel long distances up rivers and are often found in areas where rivers meet the ocean. River sharks are generally smaller than their oceanic counterparts and have adapted to their unique habitats. They play a crucial role in the ecosystem by helping to maintain the balance of fish populations. Conservation efforts are important for protecting these species, as their habitats are often threatened by human activities.