So I printed this Horsea from printables here, and came back to this.. Removed the supports and it looks like this.. Additional pic in comments.
Is this a faulty model? I sure fixed it with netfabb before slicing..
Is this something error while slicing? I'll reslicing try later maybe..
Did something happened to the Z axis? Is there not enough support?
This was printed on my Prusa Mini+ with bondtech extruder and revo micro hotend, 0.3 mm layer height with 0.6 nozzle, temp 235. Filament is Polymaker Polyflex.
Looks to me like you had a delamination. Then it just squirted unconnected plastic after that. Sure you got the temperature right? Nothing might have caused your line to feed incorrectly for a minute? Last time it happened to me it was because there was too much drag on the feed. It had fallen off the bearing onto a screw, which let it keep feeding, but with extra drag.