The ship's parts. The cargo bays can be shot open I believe but the automated turrets will open fire on you after a warning.
Clear signs of a thargoid attack.
An undockable megaship Thomas Class Bulk Cargo Ship SOD-6497 present in system Xihe orbiting planet 2. I encountered a Medusa at the scene, which when I approached, scanned me and flew off. Looks like it is supposed to be looted using the new megaship looting system introduced in 3.1. At the time of writing, this is an anarchy system, so the vessel can be attacked freely without consequences (although it does have some defensive turrets). I tried re-instancing the megaship and the next time a bunch of emergency medical ships were in the area, some of them type 9. I believe that with a sufficiently powerful ship, it may be possible to mine these large medical emergency ships for materials such as Chemical Manipulators. They flee when attacked but more always appear.