Sinbad himself is the wild symbol and he can expand to fill the entire reel if it will help to form a win.
The golden shield is the scatter symbol and it is the key to triggering the bonus round.
When the scatter symbol lands on reels two, four and six simultaneously the Leviathan Free Spins begin. You are awarded seven free spins during which the stacked symbols are reversed. This means that the first reel can have stacks that fill the entire reel and the sixth will have the smaller stacks that fill two positions.
Furthermore, during the free spins a giant leviathan wild can land and can fill up numerous positions across three reels to help and form a number of winning combinations.
Sinbad's Golden Voyage offers a top payout of 7x for landing six of the princess symbols along a payline. The giant bird symbols offers offer payouts of up to 3x, the ship star can payout up to 2x, the view of Basrah can payout up to 1.5x, the treasure chest can payout up to 1.2x and the anchor can payout up to 1.