Resident Evil Village: Moreau's Area Reportedly Had Mermaids Before Big Reworks, Content Cuts - Game Informer

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

Resident Evil Village - Game Informer

Resident Evil Village: Moreau's Area Reportedly Had Mermaids, resident evil village

Resident Evil Village - Game Informer

Resident Evil Village Reportedly Almost Had Mermaid Monsters

Resident Evil Village was reportedly going to include mermaids

Resident Evil Village: Moreau's Area Reportedly Had Mermaids, resident evil village

Resident Evil Village Reportedly Almost Had Mermaid Monsters

Resident Evil Village was reportedly going to include mermaids - Dot Esports

Resident Evil Village: Exploits For Every Single Boss & Mini-Boss