According to the publisher, Island Paradise will include mermaids, monsters, shark attacks, and underwater sex (er, woohoo), with "hysterical and horrific gameplay moments."
Gamers can preorder The Sims 3: Island Paradise to get the Limited Edition which comes with the Island Survival Pack, that includes a deserted island scenario. In addition, if 4000 copies of Island Paradise are preordered, the Barnacle Bay content pack will be included free for those who preordered before the 21st June.