For this you need to grab every snakpod in one biome. I did this in Garden Grove. Here is a list and pic of each location:-
1. In Beffica's cave. To your right as you go in the entrance.
2. Go down into the lower level of this area after leaving the cave. cross the log bridge or jump down. Over the stream and to the right in the far corner (opposite fryder cave) behind a tree on it's trunk.
3. Inside the cave with the wall paintings with the fryders in, next to the log bridge. Behind the central pillar.
4. Go back to the log bridge and to your right on the path to the scarecrow area. High up on the stone wall / pass to your right.
5. Keep going into the scarecrow area. Opposite the scarecrow above the circle fence on the stone wall, between the two trees.
Also here is a video guide for all snakpod locations in every biome. Credit to PS5trophies on You Tube for the video guide.