On the atlantis farm you will see SP ! which you can upgrade instead using XP you will be using farmville atlantis shell points !
to earn SP in atlantis you can :
– harvest sea crops
– dig up buried treasures
– restore the atlantis palace
upgrade your SP level !
– buy special items in the market
– complete quests
– expand your farm
soon in the market there will be a double shell point statue to help you level up quickly, but it will cost 225 farm cash !