Well it was my first open water dive, it was at canyon lake ( murky water with 10ft viz at the best i’ve seen). During the pool dives the water was much clearer than the lake and felt confident in the pool with no problems, but as soon as we started to descend in the murky water I guess I was about 10 ft or so when I started to have a slight panic attack (which I have not had before). We had a rope to help our descent which I held on to and closed my eyes took a few deep breaths and continued on,once on the platform I started to feel a little more comfortable with the situation and myself. We continued skills and the dive without any other problems. I am grateful that experience because now viz is not an issue for me anymore.