As time passed, the region would have cooled down considerably and contracted--thus pulling away from its surroundings and forming fractures akin to the cracks that form in mud as it becomes dry--but on a considerably larger scale.
But there is an important difference. On our own planet, lakes and seas are flowing with water, while Titan's lakes and seas are filled primarily with methane and ethane, that slosh around within these liquid reservoirs. In this never-before-seen cycle, the hydrocarbon molecules evaporate and condense into clouds that send an exotic "rain of terror" back down to this strange moon-world's carbon-slashed surface.
The moon and fishing are forever tied together and you can learn what you need to know with nothing more than a little research. That's right folks, it won't cost you one red cent to learn the information that you need to know about the moon and fishing. All you have to do is invest a little bit of time and you'll be good to go. There's no need to take the equivalent of a college course on this subject, just a little time will do.