The Redtail Tinfoil Barb (Barbonymus schwanenfeldii) is a large, active freshwater fish known for its metallic silver body and vibrant red fins. They have a distinctive black blotch on the dorsal fin and a black stripe on each lobe of the red caudal (tail) fin. These barbs are peaceful but can be greedy eaters, requiring a large aquarium to accommodate their size and active nature.