Tartaruchi is a big scary word that doesn't need to scare you. It's not a monster or anything like that, it's actually a kind of fish! A tartaruchi is a fish with a big shell on its back that looks like a backpack.
This fish is very special because it can stick its head and tail out of the shell and still be protected from danger. It's like if you wore a backpack that was so BIG it could cover your whole body. But instead of books and pencils in the backpack, the tartaruchi carries its own body around with it.
Tartaruchi fish live in the ocean, and they like to eat small fish and plants. They can swim pretty fast, even with their big shell on.
So, when you hear the big word "tartaruchi", just think of a fish with a really cool backpack shell!