Osteoglossidae, commonly known as the bony tongues, is a family of freshwater fish found primarily in tropical regions. They are characterized by their unique bony structure in the tongue, which aids in their feeding habits. This family includes several genera, such as Arapaima and Osteoglossum, which are known for their large size and distinctive appearance. These fish are typically found in rivers and lakes, where they inhabit shallow waters. Osteoglossidae species are known for their air-breathing capabilities, allowing them to survive in low-oxygen environments. Their diet mainly consists of smaller fish and invertebrates, making them important predators in their ecosystems.