Water
I don't have screenshots, but if I remember correctly, two of the fauna on Gagarin in Alpha Centauri were fish when I surveyed the planet. I ran along a coast for quite a while to get all the scans.
2
Did you know if you are moving many items you can press left on the thumstick and d-pad and it will count twice as fast
Just press LB (if you're on Xbox) to skip down in larger chunks. Same as in Skyrim.
5
Ship stops before entering Space Anomaly
Every time this happens for me, it does actually move, just very slowly. It takes a minute or so, then it passes a threshold and continues inside.
1