I know most likely no one cares, but I'm still gonna talk about it, and when and where I first encountered them

• Note: I'm only talking about the hostile ones in the first one, I have yet to play Below Zero

Reaper: Believe it or not, I saw my first Reaper when I was going to shut down the Enforcement Platform. And I was in safe bounds since it chouldn't hear me. Later I took my Cyclops with my Prawn Suit in. And now it's no longer alive...

Ghost: I was returning from meeting a group of Sea Treaders in the Grand reef, and I was looking at the cameras and saw a blue tail pass by. Next thing I know, I hear "Warning: Creature Attack" And set the movement mode to Flank. I looked out the tower camera and saw it's face and managed to survive with only 1 external hull damage.

Sea Dragon: I never actually been attacked by them, only in self-defense similar to the Reaper. But I saw them and they kept charging at me, never attacking however. But while I was leaving the Lava Lakes after hatching the babys, the one down there pushed me into the wall, and vanished from existence.

The Ghost in the Bonefields did that last part as well.