Ever wanted to be a Mermaid, Werewolf, or Vampire? Now you can with Mermaids and Mythical Creatures! This mod allows the player to transform into a Mermaid when entering the water, transform into a Werewolf at night, and transform into a Vampire, each with their own unique abilities, playstyles, and progression.

Now updated for v3! The mod has fully rebranded from Mermaids to Mermaids and Mythical Creatures with the addition of Werewolves and Vampires.

 

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Features:

Three mythical creatures, each with their own transformation triggers, abilities, and cosmetics.

• Grow a Mermaid Tail, Werewolf form, or Vampire form and keep your cosmetics.
• Breathe underwater with increased swim speed as a Mermaid.
• Prowl the night as a Werewolf with heightened power after dark.
• Stalk the shadows as a Vampire, thriving on devastating critical strikes.
• Custom Mermaid NPCs that spawn in the ocean.
• Mod fully customizable with permissions and config for all three creature types.
• Configurable transformation options for every creature -- Example: Transform only by potions, only at certain times, and/or enable for all.
• Custom models, cosmetics, and animations, WIP.
• Compatibility support with 9+ mods. Including a custom Mermaids mod API.
• Compatibility with Endless Leveling as an addon that adds the Mermaid, Werewolf, and Vampire races with variations.
• Compatibility with Orbis Origins as an extension that adds the mythical creature species.
• Works in Multiplayer and Singleplayer.
• and More!

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Mythical Creatures:

🧜 Mermaids

After spending a couple seconds in the water, you'll transform into a Mermaid, growing a tail and gaining increased swim speed, water breathing, and night vision while underwater. Once you return to land, your legs regenerate and the tail disappears (can be modified via config). Custom Mermaid NPCs spawn out in the oceans, and dedicated cosmetics like tails, ear fins, and seashell tops let you customize your look.

🐺 Werewolves

Werewolves transform based on the time of day: by default, you'll turn into a Werewolf at night and return to human form once daytime arrives, with both the day and night transformation times fully configurable by admins. Alternatively, admins can switch to a potion-only mode, where you'll only transform by drinking a Werewolf Potion (small and medium potions grant a temporary transformation, while the large potion grants a permanent transformation during the night) or by carrying a Moon Charm, which draws on the moon's power at night to trigger the change. Admins can also disable Werewolf transformations during specific moon phases (Full Moon, Waxing Gibbous, First Quarter, Waxing Crescent, New Moon). Players can toggle their own ability to transform on or off, and choose from multiple Werewolf models through the in-game Werewolf UI, including additional models unlocked through compatible add-on mods.

🧛 Vampires

Vampires can transform in one of two modes, set by admins: always remain in Vampire form, or only transform at night (or by drinking a Vampire Potion). Like the Werewolf potions, small and medium Vampire Potions grant a temporary transformation while the large potion grants a permanent one. Players can toggle their own Vampire transformation on or off, and customize their Vampire's eye color through the dedicated Vampire UI.

Through the Mermaids Premium addon, you can add custom Endless Leveling races for all three mythical creatures that unlock unique race variations as you progress.

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Roadmap:

• Particles when you transform into a Mermaid, Werewolf, or Vampire.
• More Mermaid related sea life and/or underwater things.
• More Werewolf and Vampire combat abilities and effects.
• More cosmetic armor for all three creatures.
• More creature-specific cosmetics.
• Mermaid on land animations.

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Commands, Config, and Permissions:

Commands Extra Info:

Permissions Extra Info:

Config Extra Info:

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PARTNERED SERVER:

ÆtherTale:

A second home for those who stay — where solo paths thrive and friendships form. 
From Levelers and Dungeon Grinders to Builders and RPers, every playstyle belongs. 
We strive to bring back the nostalgic feel of entering an old school PvE MMORPG genre.  

• Let them know, you came from the Mermaids and Mythical Creatures Mod: play.aethertale.net:5100

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HOW TO INSTALL:

Client:

Upload the Mermaids.jar file into your %appdata%\Roaming\Hytale\UserData\Mods\ Folder

Server:

Upload the Mermaids.jar file into your servers mods\ folder

Make sure you delete any previous version of Mermaids otherwise your world may not start.

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MOD COMPATIBILITY:

A list of all compatible mods with my Mermaids and Mythical Creatures mod can be found here.

How to enable the Endless Leveling Compatibility Addon information can be found here.

How to enable the Orbis Origins Compatibility expansion can be found here.

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VERSION COMPATIBILITY:

v2.8.0-latest : Designed for Hytale v0.5.x

v2.0.0-v2.7.2 : Designed: 2026.03.26-89796e57b & 0.4.0

v1.3.6-v1.4.3 : Designed: 2026.02.17-255364b8e

v1.3.0-v1.3.5 : Designed: 2026.01.27-734d39026

v1.0.0-v1.2.7 : Designed: 2026.01.13-dcad8778f - Supported Until:  2026.01.24-6e2d4fc36

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Mermaids Premium:

Mermaids Premium is a separate, optional paid addon jar that sits on top of the base Mermaids and Mythical Creatures mod, adding extra cosmetic and progression content for supporters. It requires the base mod to be installed, and unlocks additional integration if Endless Leveling is also present.

• Dozens of additional Mermaid tail colors, on top of the base mod's default colors.
• Full Endless Leveling race trees for the Mermaid, Werewolf, and Vampire, each with their own custom passives.
• Deeper hooks into Endless Leveling's ascension/prestige system, so your Mythical Creature choice actually feeds into your character build.

To unlock Mermaids Premium, support the mod on Patreon at any tier, then grab the Premium jar from the latest posts on the Patreon page and drop it in your mods folder alongside the base mod. Full details can be found here.

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Known Bugs:

• Mermaid tail looks block at the end (Temporary while I decrease nodes).
• You keep your tail for a small amount of time once you go on land.
• Animations are weird when you hit a block or when you're above water.
• Werewolf and Vampire animations are still a work in progress.

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Support the Creator of Mermaids:

Support me on Patreon to help me continue to make mods for Hytale. You also can support me by using my creator code SIREN at checkout.

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