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1. The tides between us by Elixerx

   Fandoms: Project Hail Mary - Andy Weir, Project Hail Mary (2026), Iron Lung (2026)  

   • Explicit
   • No Archive Warnings Apply
   • M/M
   • Work in Progress

   25 Aug 2026

   Tags

   • No Archive Warnings Apply
   • The Convict | Simon (Iron Lung)/Ryland Grace
   • Ryland Grace
   • The Convict | Simon (Iron Lung)
   • Rocky (Project Hail Mary)
   • Adrian (Project Hail Mary)
   • AU
   • Simon is a merman
   • Marine Biologist Ryland Grace
   • Eventual Smut
   • Slow Burn
   • Language Barrier
   • mermaid au
   • Not Beta Read
   • Other Additional Tags to Be Added
   • Forced Proximity
   • Courting Rituals
   • courting
   • Ryland Grace is Bad at Feelings
   • Human Rocky (Project Hail Mary)
   • Mating Rituals

   Summary

   Sent to study the first confirmed extraterrestrial intelligent species, marine biologist Ryland Grace is on a mission to understand the Mer, a mysterious ocean dwelling species unlike anything Earth has ever encountered.

   But when Grace encounters Simon, a Mer unlike any recorded before, his research takes an unexpected turn. What begins as scientific curiosity becomes something far more complicated as Grace realises the creature may be capable of understanding him in ways no human ever imagined.

   Grace must discover whether two beings from entirely different worlds can find common ground.

   Language:

   English

   Words:

   56,057

   Chapters:

   10/?

   Comments:

   138

   Kudos:

   286

   Bookmarks:

   65

   Hits:

   4,393