Throughout the infinite villages of Naruto there lay many clans, each of these clans has their own unique traits that make them uniquely, identifiably theirs. However, there are only a few clans who can say that they have a kekkai genkai, or advanced bloodline in their clan. An advanced bloodline refers to something that is passed down generation to generation in a specific clan, it is in the genetic makeup of each clan that can not be duplicated or imitated by any method. Advanced bloodlines are always used to the advantage of the user, improving their chances in combat and making them a very worthy opponent. The rulers and warlords of each country had taken advantage of each bloodline to it's fullest extent to help their chances in war, and thus the people began to associate advanded bloodlines with war and pain. This reached the point of hatred towards anybody who was part of these special clans resulting in the genocide of these individuals and whole families, as was the case with Haku.
Byakugan (White Eyes, Evil Eyes)
Clan: Hyuuga Clan
Country: Fire Country; Hidden Leaf Village
Description: The Byakugan, literally White Eyes, (or Evil Eye as it is known in the English translations) is a very special condition of the eye that occurs naturally in all members of the Hyuuga clan. While it is believed that the Byakugan is genetically related to the Uchiha clan Sharingan, it is capable of many things the Sharingan is not and as Hatake Kakashi states, in terms of insight the Byakugan surpasses even his own Sharingan.
Mastery of Water & Ice
Clan: Unknown Clan (Haku)
Country: Water Country; Hidden Mist Village
Description: The bloodline allows him to move at the speed of light between the mirrors, bouncing back and forth to the point where the opponent can not judge where he is at, while allowing him to throw piercing needles at his opponent...
Sharingan (Copy Wheel Eye)
Clan: Uchiha Clan
Country: Fire Country; Hidden Leaf Village
Description: The Sharingan, literally Copy Wheel Eye, is a very special condition of the eye that occurs naturally in some members of the Uchiha Clan. While it is believed to have been derived from the Hyuuga clan Byakugan the abilities...
Shikotsumyaku (Corpse Bone Pulse)
Clan: Kaguya Clan
Country: Sound Country; Hidden Sound Village
Description: Kimimaro has displayed the Kaguya clans frightening and graphic ability to manipulate their bone structure, they can control the density, the shape and the movement of their bones and use them as weapons...
After having read this list you may be asking yourself why things such as Akadou Yoroi's chakra leach, or the Aburame clans ability to host bugs in their body, or even Kidomaru's spider web abilities are not included on this list. The reasoning for this is simple, because as the second data book on the Naruto series states, it is not an advanced bloodline if they are not genetic, rather these skills had to be learned and may have become a clan trait or secret technique. Although it may be just unique to one clan it can not be considered a special bloodline as people born to other clans could learn techniques such as those.
