Understanding Mesmer
A dangerous creature whose visual lure can disorient the player.
This is an original reference for the first Subnautica. Your current depth rating, oxygen, available tools and navigation route determine when an objective is practical. Follow actual in-game PDA and Fabricator information for any values that vary by version.
How to use this information
Break visual focus and move away rather than investigating while oxygen is low.
What to avoid
Never trust a strange visual prompt as a safe invitation to approach.