World's Smallest and Largest Pets: A Visual Parade of Tiny Companions and Gentle Giants - Top 18 Guide

The Largest Pet Fish: The Red-Tailed Catfish

The Red-Tailed Catfish is the largest pet fish, reaching lengths of up to 5 feet. These fish are known for their distinctive red tails and playful nature. They require a large tank and a specific diet, making them a suitable pet for experienced fish owners.