A metal fish is typically a sculptural or decorative object crafted from metal to resemble a fish. These can range from stylized, artistic interpretations to realistic replicas, and may be made from materials like steel, copper, aluminum, or brass. Metal fish are often used in garden décor, wall art, or marine-themed settings, combining the durability of metal with the fluid form of aquatic life. In some cases, "metal fish" may also refer to robotic or mechanical fish used in research or underwater exploration.