Bottle 1 - Five silver barrels are hidden on this level. Destroy them using bombs or a long gun (Marty). The first one is on the right side of the ship from the first scene. The second one you will find during the storm. The third and fourth are on the Flying Dutchman. The fifth one is on the right side of that ship.  Bottle 2 - On the second level five oysters are hidden. The first one is in the first phase of the level, on the very right. The second one is again on the right. The third and the fourth are on the left side of the Flying Dutchman (behind the seaweed). The last one is behind one of the masts. 
Bottle 3 - In the first part of the level look through the spyglass for the second time and look for the pirate girl.  Bottle 4 - On the right side of the ship use Siren to destroy the glass bricks. 
Bottle 5 - On the right side of the ship use Blackbeard's power to set the lamps on fire.  Bottle 6 - During the storm go on the right side of the ship and use Blackbeard's power. 
Bottle 7 - You need to take the apple from the mast to the pirate on the left side of the ship. You will get to him through the seaweed (any pirate-ghost can get through it, like Billy).  Bottle 8 - After dealing with the cannon near the helm use the helm again. Pull out the chest. Open it as the strong character (Tattoo Pirate). 
Bottle 9 - Use the cannon on the right to shoot at the cage hanging on the other side of the ship. The ducks will fall down - destroy them using different cannons.  Bottle 10 - On the left side of the Flying Dutchman use Blackbeard to destroy red elements. Then blow up the hatch as a character with a gun (Marty). Use Siren's power and repair the damage.