Idea for a Hunter's Csll event

@procyon-mage this could be a pretty fun way to make a hunters call event. It would be funny if they added guppies too or juvenile fish as a third category. At the start of the event they're all juvenile and at the end they're all trophy fish to show the progression.

Maybe each seapost could have a unique flag that rotates on a timed basis, and the flag signifies a type of fish that could be caught there while it's active? You could catch battlegill at North Star or head over to Finest Trading Post to snag some wreckers until the flags change up.

@habiki oh that would be cool actually.