Resident Evil Village: Moreau's Area Reportedly Had Mermaids

There was also a "slimy sorta Tyrant-like creature" that stalked you through the swamp as well.

Resident Evil 8 Village Moreau's Lab Items & Treasure, How To Clear Area

Resident Evil Village was reportedly going to include mermaids

Resident Evil Village characters

Moreau's Reservoir Walkthrough and Maps Resident Evil Village (Resident Evil 8)｜Game8

Moreau's Reservoir Walkthrough and Maps Resident Evil Village (Resident Evil 8)｜Game8

Salvatore Moreau, Resident Evil Wiki

Moreau's Reservoir Walkthrough and Maps Resident Evil Village (Resident Evil 8)｜Game8

Resident Evil Village Reportedly Almost Had Mermaid Monsters

RE8 Reservoir and Moreau walkthrough - Polygon

Escape Moreau: Puzzles & Walkthrough Resident Evil 8 Village (RE8 Guide)