For this achievement you need to scan all species on one planet. Follow the tutorial missions until you receive your scanner and start scanning everything with
. You can check how many species are on your current planet by pressing
and going to Discoveries and Fauna. Remember to look in the sky for flying species and there may be some species that are underground only or water only so you may have to do some exploring to find them all.
Once you have found all species for that planet, hold
on the paw print in the upper right corner of the Fauna tab under Discoveries and it will turn gold and you will get the achievement.
There must be animals on the planet for you to get credit. Barren planets with no wildlife do not count.