Omaha/8 (also Omaha Hi/Lo, Omaha High Low, Omaha H/L/8) is another version of Omaha. In this variant almost everything is very much Omaha alike. The difference lies in the exposing of the cards by the end of the game, the money in the pot are split between player possessing the highest hand and the player holding the lowest hand, on conditions that the low hand qualifies.
To comprise a low hand, the player needs to have 5 distinct cards with no pairs, and without any card, which is higher than an 8. Since you are to use two cards to comprise the card combination, two of the cards in your hand and three from the board should be 8 or lower. As flush or straight are of the same rank in Omaha the the lowest hand is A-2-3-4-5 of any suit. Ranking starts with the highest of your low cards, thus 7-6-5-4-3 is 8-low and is stronger than 8-7-5-4-3-2. If two players make a low hand and possess the same hi card, the player, holding the next highest card gets the pot, i. e. 7-5-4-3-2 is stronger then 7-6-4-3-2. If there is no low hand, high hand takes everything.
Omaha High Low is the same as Omaha High with players to comprise a five card combination. Everyone who takes part in the game is dealt four cards, which are dealt face down, they are called the hole cards. The croupier then puts five cards, which are dealt face up, in the middle of the table, this cards can be used by everyone who participate in the game. The peculiar feature of Omaha/8 is the fact that each player at least in potential has two hands, high and low. It should be noted that a player can take the whole pot if he (she) possesses the best low and high hand at the same time.