How can I save my cuddlefish from becoming fish food?

The large healthpool thing seems to be incorrect/a myth. They do die quickly to larger predators. Since they follow you everywhere, they tend to find themselves in dire situations quiet often. You cannot heal your cuddlefish and the only way to protect your cuddlefish is to leave it in the tank. And No, they cannot reproduce and there are only 5 cuddlefish eggs in the game.