Hopefully there isn't a game already like this one. I had a good look around but didn't find anything so here it is!
Animal Game is a very simple word game. You can only say one animal for the letter from the person above you, examples will be below. You can also do any type of animals from sea creatures to even dinosaurs, just make sure it's not made up.
Example: Some puts a letter like: T You answer with animal: Turtle The you post a letter below: S (Other people will carry this on...)
(If you have played any of my other games then it's mostly like them; Color and Name game!)