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 Village was reportedly going to include mermaids

RE8 Reservoir and Moreau walkthrough - Polygon

Search Completed: Moreau Reservoir in Resident Evil 8 Village

RE8 Reservoir and Moreau walkthrough - Polygon

Once we believe in ourselves, we can risk curiosity, wonder, spontaneous delight, or any experience that reveals the human spirit - ART FLAIR

Where to find the Mermaid Ball in Resident Evil Village - Moreau's Labyrinth Puzzle - Gamepur

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

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

Where to find the Mermaid Ball in Resident Evil Village - Moreau's Labyrinth Puzzle - Gamepur

Resident Evil 8: The Village's scrapped mermaid monster was delayed by a budget - Real Mi Central

RE8 Reservoir and Moreau walkthrough - Polygon