Star wars knights of the old repbulic (were to find a star map)

On the planet that is all water, and when you first land you meet some aliens (most people call them fish people). Then you have to go down into a under water base and there are mad fishy people. I have killed them all and i have the envorimental suit or whatever it is called and i have been through the air locks lending to the wedged door and i went down forther down the hall way (very slowly) and i talked to a survivor and he was going to take me to this place then he was picked up by when of those sharks. I went out into the water and i went to the right there was a dead end then i went to the left and there was a shark, but you can't have a weapon with that suit. SO i went back in and there was a another air lock near a broken droid and it said it was locked on the outside or something like that. Can some one tell me what to do!