Sea lions are so cute to start off with it is hard to make them even more cute (or cuter if that's a word?) but you have managed to do that in this photo.
The composition of the photo is amazing. I love that the whole image is pretty much the sea lion. It really gives it a clear vision.
The pose is probably the best thing about the photo. With her head craned around and mouth open it just makes it so unique and lots of credit should go to you for snapping the picture at the right moment!
Yes, it was taken in the wild. In Galapagos, animals are not afraid of humans because they have never been hunt. You could literally sit on them and you actually have to watch your step not to walk on iguanas [link]