odd crack in a 25 Seafari

[cdavisdb]

Just returned from a 8 day Bahama trip(I'll post a trip description as soon as I get the pics from my diving buddy). On the way back (I think) the hull developed an odd crack (pics below). Conditions were 15-20 knots of wind behind us, seas 3-4 to sometimes 5 at the center of the Stream, running 23 knots. We slammed a few (very few) times launching off waves and coming down not quite on the keel, but it was nothing that any good hull would not tolerate just fine. The crack is short, but appears to be deep, with wispy glass fiber ends coming out. It does not look like an impact to me (other opinions?) and I wasn't aware of hitting anything. There is very little stress cracking around it and it seems to be right under one of the main stringers, a very strong part of the boat. There is no sign in the surrounding gelcoat that would indicate a previous repair. I can cut the bottom out of a storage compartment and get to the inside of the hull right at the crack, but haven't gotten that far yet.

Anybody seen anything like this? Any ideas as what caused it, what I may find when I open up the inside, or what is the best way to fix it? For sure, I'll have this professionally done, but would like to have a good background before I take it in.

Otherwise the 25 seafari is near flawless, truly a great Bahama cruiser.

Connor