a couple days ago my jawfish started acting weird wasnt coming out a lot. then i noticed towards the bottom of its belly its big and hanging out is a white string...the fish hasnt eaten since it has been acting weird either..sometimes i see it moving rocks around but other than that it doesnt do anything...the fish has been by itself in my tank for a couple of months. Is it possible it got pregnant at the fish store and just didnt show any signs until now?