[She's a patient woman. She can wait. She'd rather have him thinking things through than dismissing her out of hand or taking her word as law.]

Yes, it's alive. And in constant motion, unless it makes landfall.

[It took a while for Padmé as well. He has her sympathy.]

I don't believe there are more turtles like Tu Vishan, no, but you can learn this from materials in the Welcome Center as well. As for what happens should he decide to completely acknowledge us and wake up, that has yet to be seen from what I understand. We shall all have to wait and see.