We have had our tank for several months and have had two fish escape. The first was a fairy wrasse, that jumped out twice when being fed. The third time, we found her on top of the screen, fried under the light.
The second was a goby, that lived under a rock and hardly ever came out. We found him on the floor in the morning. The screen was in place, so we are not sure how he got out. He was still wet, so he hadn’t been out long, but he was dead