Lurking in deep, dark waters, piraiba catfish rely on their barbels to sense prey. These apex predators are the largest catfish in the Amazon River, growing over 100 pounds. Exciting levelled text, thrilling photos, and colourful infographics reel in struggling and reluctant readers as they learn about the piraiba's freshwater and brackish habitats, what it eats, how it hunts, and any threats to its existence.