The cat is a pet in Assassin's Creed IV Black Flag, found in many port towns (such as Havana).
Cats weren't as domesticated then as they are now, and can often be found wandering about town. They were a sort of communal pet, as villagers would put food and drink out for them to make sure they were well cared for.
You can pet cats.
Effect
Using the pet action will make the cat play with you by going underneath and in between your legs
Types of Cats
This game has several types of cats, including: