Kraken

[Bonar]

You pretty much have to follow the boat until ingame event where the boat vanished into the deep. If he stop, try to move around him to get the boat to respond/continue moving.

[Sleeping Sun]

I had such a problem. Just swim around, but not very far, because there is a script that as i suppose is triggered in a certain point. Spoiler (white colour): When you are in that point, the craken will destroy the captain's ship and attack you

[darthmaul]

Its right next to the titan museum the one filled with orcs you have a quest there also...watch out kraken is nasty in the begining three arms 8000hp each plus he's spawning some spiders or fishesh can't remember..