spider cracking on top deck
 

has anyone here experienced with spider cracking? I have some right around the top of the cabin door/opening and couple small ones near the glove box, I have noticed the ones near the cabin opening have gotten a little worse over the course of the summer. is this anything to worry about or anything that I should repair, I know its and older boat- 2000, and the gel coat might be getting a little brittle over time, just wanted to hear some input from others...

btw, I do boat on lake of the Ozarks and it has been a little rough to say the least around the 4th, shootout week and labor day!!