Sailfish are one of the most popular fish to catch, but many people don't realize that they can't be kept as pets. Sailfish are highly migratory fish, meaning they travel long distances between different feeding and breeding grounds. This makes it difficult to keep them in captivity, as they need a large tank or aquarium that can simulate their natural habitat. Additionally, sailfish are very sensitive to changes in water temperature and quality, so even a small change in their environment can cause stress or illness. For these reasons, it's best to admire sailfish from afar and leave them in the wild where they belong.