Did you leave your cargo door open too long while unloading and now have a bat-equivalent predator flying around your ship?
Did an Opossum-like creature crawl into a hatchway while you were making repairs?
Did your ship's cat let you know that there was a 7 foot tall creature behind you?
Ship's Pets 1d6
1.) a House Cat walks up the ramp one day
2.) a Tree Kraken from Knorbes
3.) an Unidentified Alien Plant that eats bugs
4.) a Robotic Critter
5.) a Llellewyloly stowaway until you figure out it's a Sophont
6.) an Alien Iguana starting to make a chrysalis
2.) a Tree Kraken from Knorbes
3.) an Unidentified Alien Plant that eats bugs
4.) a Robotic Critter
5.) a Llellewyloly stowaway until you figure out it's a Sophont
6.) an Alien Iguana starting to make a chrysalis
Roll every time you open your boarding hatch... if you dare.
I'm sure there's a lot more. Use or re-write the table to use in your game.