Ive noticed that my little turtle is now aware of my cat since I put her in her glass tank. The cat will sit on the floor looking up at the tank and she can see him. She swims to the edge of the tank and her head will point straight down to the cat as she looks at him. Then she begins trying to nip at him. As the cat walks away because its uninterested she tries to swim along side of the tank in his same direction nipping.
I thought it was so cute when I first saw her do this.