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1. scrimshaw by Mayumara

   Fandoms: Undertale (Video Game), Subnautica (Video Game)  

   • Mature
   • Creator Chose Not To Use Archive Warnings
   • Gen, Multi
   • Work in Progress

   06 Sep 2026

   Tags

   • Creator Chose Not To Use Archive Warnings
   • Sans (Undertale)/Reader
   • Bad Sanses/Reader
   • Sans Ensemble (Undertale)
   • Reaper Leviathan (Subnautica)
   • Sans (Undertale)
   • Ghost Leviathan (Subnautica)
   • Sea Dragon Leviathan (Subnautica)
   • Gargantuan Leviathan (Subnautica)
   • Something New Sans | Killer (Undertale)
   • Dreamtale Nightmare Sans (Undertale)
   • Dust Sans (Undertale) - Freeform
   • Horrortale Sans (Undertale)
   • Bad Sanses | Nightmare's Gang (Undertale)
   • Reader Insert
   • Neutral pronouns for reader
   • Can be romantic or platonic
   • leviathan skeletons
   • the types of leviathans will be tagged as the story progresses
   • kind of just freeform
   • survival drama
   • some g/t elements
   • i mean they're LEVIATHANS what do you expect
   • thalassophobia
   • Drowning
   • Claustrophobia
   • Isolation
   • everyone is touch-starved and lonely
   • Subnautica AU
   • reader is a marine biologist
   • author is a nerd but not an expert
   • Reaper Leviathan Killer Sans
   • content warning for violence against animals
   • Medical Trauma
   • Ghost Leviathan Dust Sans
   • Sea Dragon Leviathan Horror Sans

   Summary

   You were an ordinary maintenance worker, part of the crew of the Aurora when it crash-landed on an alien world and left you stranded in a hostile ocean. There are probably worse places to be stuck; at least the scenery is pretty, and you've always been passionate about marine life and alien research.

   ...what exactly did your PDA mean by "multiple leviathan class lifeforms?"

   Language:

   English

   Words:

   31,225

   Chapters:

   16/?

   Comments:

   271

   Kudos:

   662

   Bookmarks:

   162

   Hits:

   10,933