Slay Tu'u'gwar and then return to Tua'kea at Moa'ki Harbor.
The time has come my friend: Tu'u'gwar must be dealt with!
I've prepped the meat so that the beast is sure to come once you bait the hook I have out in the water. Just follow the fishing line here down to it.
Whatever you do, don't let Tu'u'gwar swallow you whole, <name>!