The Catfish, also known by nicknames such as the Wels Catfish and Red Tail Catfish, originates from freshwater habitats in Europe and South America, respectively. Notable for their distinctive whisker-like barbels around the mouth, catfish have smooth, scaleless skin and a robust body structure suited for bottom-feeding. They can grow to impressive sizes, with the Wels Catfish being one of the largest freshwater fish in the United Kingdom. Temperament-wise, catfish are generally peaceful but require spacious tanks or ponds due to their potential size and active nature. They are suitable for experienced aquarists or pond keepers who can provide appropriate care, including a varied diet and clean, well-oxygenated water. Keywords like "catfish for sale UK," "Wels catfish for sale," and "Red Tail Catfish for sale" reflect common search interests for enthusiasts looking to acquire these fascinating fish in the UK market.