Yes Atticus is a red-ear slider. I'm not sure how old he is. And yes he has a rock to bask on (though for the past 2 weeks he hasn't been doing that). A few weeks ago I noticed a red spot on his shell. LIke I said I thought it was blood. Today I noticed another one. I didn't notice it yesterday when I cleaned his tank. I didn't know their shells could change color. I'll try to take a pic of it and post it so you guys can see it. Thanks so much!

Tara