The sea monsters have "health meters" just like the pirate ships. If you shoot them enough times, they die and release salvage that you can collect.
Nothing. Captain Crawfish was there. But you don't exactly do anything on Skullduggery island. You defeat Crawfih on sea.
I have defeated a sea monster, but there is more than one, so it depends which one you are defeating.
There are no shortcuts. You earn doubloons by salvage, by trading, or by sinking creatures and pirate ships. The sea creatures are a prolific source of doubloons, and appear mainly around Dragon Cove. You will need skill and practice to defeat them on a regular basis. (see related trading question)
You have to defeat ships and sea monsters and pick up the cargo that they leave behind when they sink.
Once you have the largest ship (the Phoenix Warbird), and hire the Cannoneer, you can defeat Captain Crawfish. Sail to the sea near Skullduggery to fight him. Once you win, return to Fort Ridley and the Governor will give you the location of the buried treasure (and a special shovel). Dig up the Buried Treasure on Skullduggery Island to win the game. (see solution at the related question)
here's the deal, YOU CAN'T DO THAT. you can sail out to sea on a boat, but you can't swim out to sea.
Skullduggery sea is in the bottom left on the map
Yes. You can still sail and fight pirates and sea monsters, but there is little else to do except amass a huge fortune in doubloons. Be aware that you still lose doubloons if you are sunk, so you could be risking millions. Nothing to worry about once you have won.
The blimp is at Fort Ridley, the middle island, next to your ship/the sea. Hope this helps!
You can't sell your boat. But any one but the raft has a small trade-in value on a larger ship. Collect doubloons from salvage, and by sinking pirates or (more easily) the sea creatures around Dragon Cove.
limestone island is for by the accumulation of dead sea creatures
dont go in your boat just go in the water for a second and then jump out