For fish that have a time window (say 3:00am to 5:00pm), does it end the ability to catch that particular fish exactly at 5:00pm even if your line was in the water before 5:00 waiting on a bite?

Going back after some missing ARR big fish and was wondering because I had a successful mooch into a HQ fish to mooch again and hit the button on the second mooch about 2 minutes (server time) before the window ends. Did not get what I was after but could have been RNG since that particular double mooch has 3 outcomes.

Just curious if I had a chance or maybe to just end 30 server minutes before the end of the window if your not in the water already with the proper mooch.