The Tinfoil Barb (Barbonymus schwanenfeldii) is a large, active freshwater fish that is native to Southeast Asia, specifically in the Mekong and Chao Phraya River basins. It is known for its silvery, reflective body and its elongated, diamond-shaped scales that look like tinfoil.

Tinfoil Barbs are popular in the aquarium hobby due to their size and active behavior, but they require a large tank (at least 125 gallons) and plenty of swimming space. They can grow up to 14-18 inches (35-45 cm) in length and are known to be jumpers, so a tight-fitting lid is necessary to prevent escape.

In terms of diet, Tinfoil Barbs are omnivores and will eat both plant matter and small invertebrates. They can be fed a variety of foods including pellets, flakes, frozen or live foods. Tinfoil Barbs are generally peaceful towards other fish, but their size and active nature can intimidate smaller, slower-moving species. It's best to keep them with other large, active fish in a well-planted aquarium with plenty of hiding places.