Freshwater eels, primarily from the Anguillidae family and Anguilla genus, are fascinating elongated fish. These nocturnal creatures rely on their acute sense of smell for hunting due to their relatively poor eyesight. They are catadromous, living in freshwater before migrating to the ocean to spawn. Known for their ability to squeeze through tight spaces and bury in the substrate, freshwater eels are captivating but challenging aquarium pets. With around 800 species, they display a vast array of sizes and behaviors. In certain cultures, especially in East Asia and Europe, eels are a prized food source and are extensively farmed. Their distinctive life cycle and variety make them a constant focus of study. Proper water conditions are vital for freshwater eels in captivity. Ideal parameters include a tropical temperature range of 72-82°F (22-28°C), a pH level of 6.5-7.5, and water hardness not exceeding 15° dGH. Tank sizes vary by species, from 30 gallons for smaller eels to 200 gallons for larger ones like the electric eel. Adequate aeration and filtration, along with regular water changes, are crucial. These parameters may slightly differ for each eel species, so specific research is always recommended.