The Family Ophidiidae consists of fish commonly known as cusk-eels. Synonyms for this family include brotulids, brotulas, and codlings. These fish can be found in deep waters all around the world and are known for their elongated bodies and unique jaw structure. The Family Ophidiidae is an important part of marine ecosystems and serves as both predator and prey. Despite their unassuming appearance, cusk-eels are fascinating creatures and have been the focus of much marine research. Scientists continue to study and classify these fish, hoping to better understand their role in oceanic food chains and their potential applications in medicine and industry.