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Mermaid Testing

by ThatPreston

All Games
Mermaid Testing

Stats

Live numbers from Roblox
Players
933
Visits
669,456,197
Upvotes
65,007
Downvotes
18,766
Rating
77.6%
Favorites
517,171
Average Playtime
9.00 Minutes
Game Updated
Dec 18, 2025

How popular is Mermaid Testing?

How the game is trending over time
Concurrent players
933
New visits
+11,908,320
Like percent
77.599%
New likes
+1,623

About Mermaid Testing

What the game is about and where to play it

Mermaid Testing is a morph roleplay game on Roblox by verified developer ThatPreston where players transform into merpeople, experiment with elemental water powers, and socialize in a shared ocean world. Despite the "Testing" name reflecting its origins as a mechanics sandbox, the game is a fully maintained experience with 648 million visits and consistent player counts in the 1,000-2,000 range - making it far and away the most-visited mermaid game on Roblox.

The hands-on elemental power system is what sets Mermaid Testing apart from pure social mermaid games:

  • ⚔️ Throw water bubbles to transform other players into merperson form - a unique player-to-player interaction mechanic
  • ⚔️ Freeze water bubbles with the Ice power to create damaging projectiles
  • 🗺️ Dive into the ocean by running toward water and jumping, seamlessly entering the underwater world
  • 🎭 Toggle between human and merperson form based on water contact in 20-player social servers
  • 🗺️ Form jelly platforms on the water surface using the Jelly power for creative movement

Water, Ice, Steam, and Jelly each have distinct mechanics that interact with the environment and other players in different ways. There is no currency system or progression ladder - the draw is the creative power sandbox and social interaction that emerges from the elemental mechanics.

For players interested in other mermaid games on Roblox, Mermaid Testing offers interactive power gameplay that Mermaid Life and Mermaid Lagoon do not, while Mermaid Isle provides a deeper RPG and story experience for players wanting structured progression.

Available on

PC
Yes
Mobile
Yes
Console
No

Mermaid Testing FAQ

Everything you need to know about Mermaid Testing - from how to play to where our data comes from.

Ask in our Discord
What is Mermaid Testing?
Mermaid Testing is a morph roleplay game on Roblox by ThatPreston where players transform into merpeople and use elemental water powers including Water, Ice, Steam, Jelly, and Dive. It has over 648 million visits and is the most-visited mermaid game on Roblox.
Who made Mermaid Testing?
Mermaid Testing was created by ThatPreston, a verified Roblox developer. The game launched in October 2020 and received its most recent update in December 2025, confirming active ongoing development.
Does Mermaid Testing have codes?
Mermaid Testing does not use a promotional code system. There are no codes to redeem in the game.
How do the water powers work in Mermaid Testing?
Water lets you form and throw water bubbles that transform players into merperson form on contact. Ice freezes a bubble so it deals damage instead of transforming. Steam boils a bubble and can also dry off merpeople above water. Jelly creates a solid platform on the water surface for movement.
How do I transform into a merperson in Mermaid Testing?
You transform into merperson form by entering water - run toward the ocean and jump to dive in. Other players can also throw water bubbles at you to trigger the transformation. You return to human form when you leave the water.

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