Lots of possibilities. While the surface of Venus is about 90 atmospheres, it is the equivalent of about 1300m underwater, where lots of complex sea life dwells.
Temperature and noxious gases are another problem. While there might be animals evolved to handle these for a short time, they would need to quickly return underground where it could be substantially cooler.
The best possibility is that there is a large body of liquid underground that when hot, sinks, and when cool, rises, thus creating a cooling current between deep underground and the surface.
“Temperature and noxious gases are another problem.”
One of the posts above says that the surface air is clear with no wind. So there would have to be underground water so deep it wouldn’t be burned by by 400 degree C.