Skellig Island, Great Skelligs
Little Skellig is the smaller one of the Skellig Rocks -- hence the name ;-)
You can't go there as it is only inhabited by birds: There's thousands of gannets here as well as puffins, seagulls, razorbills, kittiwakes etc living here. We also saw some seals lying in the sun here.
On the way to Skellig Michael your boat will reduce speed around Little Skellig so that you can take many pictures and have a look at all those birds.