The Royale High Mermaid Update launched on September 19, 2025, introducing 3 hidden treasure chests containing 630+ diamonds and XP, plus a magical Mermaid Potion Quest that unlocks six elemental mermaid tails through the new Mermaid Treasure Shop. After nearly six years since mermaid tails were removed in November 2019, this revolutionary update transforms Campus 4's beach area into an underwater paradise filled with bioluminescent waters, mysterious bottles, and valuable rewards that every player needs to discover.
| Chest # | Location | Reward | Difficulty |
|---|---|---|---|
| Chest 1 | Far-left island cave, Campus 4 Beach | 400 Diamonds | Easy |
| Chest 2 | Far-right island underwater | 150 XP | Medium |
| Chest 3 | Opposite from Chest 2 location | 80 XP | Easy |
| Total Rewards | All 3 Chests Combined | 400 Diamonds + 230 XP | - |
This comprehensive guide reveals every secret of the Mermaid Update, from precise treasure chest coordinates to mastering the enchanting potion quest system that's captivating millions of players worldwide in 2025.
Contents
When I first logged into Royale High after the September 19th update dropped, the transformation was immediately breathtaking. The developers didn't just add new items—they created an entire ecosystem of interconnected features that fundamentally changes how we experience the game. The beach area of Campus 4 now pulses with magical energy, featuring glowing waters that shift from deep turquoise to ethereal purple as evening approaches.
The update brings three major components that work together seamlessly. First, the hidden treasure chests provide immediate rewards for exploration. Second, the Mermaid Potion Quest introduces a narrative-driven progression system unlike anything we've seen before. Finally, the Mermaid Treasure Shop opens up an entirely new economy of aquatic accessories and transformations.
What makes this update particularly special is how it rewards both casual players and dedicated treasure hunters. You can grab the chest rewards in about 15 minutes if you know where to look, while the potion quest system offers weeks of engaging content as you collect all six elemental variations.
The first chest offers the most valuable reward and thankfully, it's relatively easy to find once you know where to look. Starting from the main Campus 4 beach area, swim directly toward the island on your far left. This island stands out with its distinctive rock formations and palm trees swaying in the ocean breeze.
Dive underneath this island and you'll discover a small cave entrance that's easily missed if you're not actively searching. The entrance appears as a dark opening in the rock face, just large enough for your character to swim through. Navigate inside this underwater cavern and you'll spot the gleaming treasure chest waiting in the shadows. Opening it instantly rewards you with 400 diamonds—a substantial boost to your currency that can fund multiple shopping sprees in the various Royale High shops.
Pro tip: If you're having trouble locating the cave entrance, try adjusting your camera angle to look directly at the island's underside. The entrance becomes much more visible when viewed from below rather than from the side.
The second chest requires slightly more exploration but rewards patient players with valuable experience points. From the beach, direct your attention to the far-right side where you'll notice another island distinguished by a characteristically bent palm tree—it curves almost horizontally, making it an excellent landmark.
Dive beneath the ocean surface near this island and swim to the right side. Here's where keen observation pays off: look for strands of green seaweed or grass swaying in the current. These aquatic plants mark the entrance to another hidden area. Just past these green markers, you'll find a small opening that leads to the second treasure chest. Claiming this chest grants you 150 XP, accelerating your journey toward higher levels and unlocking additional game features.
The third chest represents brilliant game design—it's practically handed to you once you've found the second chest, rewarding thorough exploration. After collecting chest #2, perform a complete 180-degree turn. You should now be facing the opposite direction from where you found the second chest.
Swimming forward from this position, you'll notice another small underwater area that's clearly visible even from a distance. The chest sits in plain sight within this space, almost like the developers wanted to reward players who take time to explore thoroughly rather than rushing back to the surface. Opening this final chest adds another 80 XP to your collection, bringing your total haul from all three chests to 400 diamonds and 230 XP.
The Mermaid Potion Quest represents the heart of this update, introducing a completely new way to obtain mermaid tails that's far more engaging than simply purchasing them with diamonds. The quest begins at Campus 4's beach, where you'll discover a mysterious bottle placed conspicuously near the shoreline. This isn't just any bottle—it contains an ancient message from sea creatures, hinting at magical transformations awaiting those brave enough to complete the journey.
When you first interact with the bottle, you'll receive cryptic instructions that reference the ocean's bioluminescent properties. The message speaks of collecting the sea's magical essence during specific times, creating an atmosphere of mystery and anticipation that elevates the entire experience beyond typical Roblox quests.
Here's where the quest becomes truly magical. You must wait until evening arrives in the game—and this isn't just any arbitrary timer. The developers synchronized this feature with your local midnight, meaning the "evening" phase corresponds to real-world time in your location. This innovative approach creates a shared experience where players worldwide participate in the ritual at different times, adding authenticity to the magical transformation process.
When evening finally arrives, the ocean transforms into a spectacle of glowing particles. The bioluminescence appears as shimmering, ethereal lights dancing through the water, creating one of the most visually stunning moments in Royale High history. Wade into these glowing waters while holding your empty bottle, and you'll automatically begin collecting the magical essence. Different areas of the beach may display varying intensities of bioluminescence, but any glowing section will work for the collection process.
After successfully collecting the bioluminescence, the quest moves to your personal dorm room—a clever way to integrate existing game spaces into new content. Head to your dorm and enter building mode. The bottle, now filled with glowing essence, must be placed in an open, visible location within your room. This isn't just busy work; it represents the brewing process as the magical essence transforms into a powerful potion.
The placement matters more than you might think. The bottle needs adequate space and visibility, so avoid tucking it behind furniture or in cramped corners. Many players report success placing it on desks, nightstands, or central floor areas where the magical energies can properly circulate.
Completing the quest for the first time yields multiple rewards that fundamentally change your Royale High experience. First, you'll earn the exclusive "Fins Forever!" badge—a permanent testament to your aquatic adventures. Second, you'll receive one of six elemental mermaid potions, randomly selected to ensure each completion feels fresh and exciting. Finally, and perhaps most importantly, you'll unlock access to the Mermaid Treasure Shop, an entirely new shopping section filled with exclusive aquatic items and transformations.
The new mermaid system abandons the old model of simply purchasing pre-designed tails. Instead, each elemental potion offers unique visual effects, color palettes, and magical properties that reflect different aspects of ocean magic.
This striking transformation features scales that shimmer between deep red and molten orange, with fin tips that appear to glow with inner heat. Swimming leaves a trail of warm bubbles, and the tail occasionally sparks with ember-like particles—perfect for players who want to stand out with bold, passionate designs.
The classic choice reimagined for modern Royale High, featuring scales in various shades of blue that shift like ocean waves. The tail includes translucent sections that refract light beautifully, and swimming animations include graceful water spirals that enhance the aquatic authenticity.
Featuring scales that resemble polished gemstones in earthy browns and forest greens, this tail includes crystalline formations along the fins. The unique selling point: occasional sparkles that resemble underground minerals catching light, perfect for players who appreciate natural beauty with a magical twist.
The lightest and most ethereal option, with scales in soft whites and pale blues that seem to float rather than swim. The tail includes wispy, cloud-like extensions that move independently, creating an otherworldly effect that's particularly stunning in Campus 4's new atmospheric lighting.
Radiating pure magical energy, this tail features scales in brilliant golds and pristine whites with an actual glowing effect. Swimming leaves a trail of light particles, and the tail periodically pulses with solar energy—ideal for players who want to embody divine oceanic power.
The mysterious option features scales in deep purples and midnight blues with silver accents that catch light dramatically. The tail includes shadow effects that create an aura of mystery, and swimming animations include dark wisps that trail behind—perfect for gothic mermaids and mysterious sea witches.
Beyond the six elemental options, September brings an exclusive addition: the Goddess of Triumph Sea of Strength Mermaid Potion. This special edition tail, adorned with childhood cancer awareness ribbons in gold, represents courage, compassion, and triumph everlasting. Unlike other potions that require quest completion, this one can be purchased directly but only appears during September each year.
The Goddess of Triumph potion stands as more than just a cosmetic item—it's a symbol of community support and awareness. The developers announced that this particular potion will return annually every September, creating a tradition of compassion within the Royale High community while supporting an important cause.
The Mermaid Treasure Shop revolutionizes how we acquire aquatic accessories. Unlike traditional shops with fixed prices, this mystical marketplace features dynamic pricing that changes daily and varies between players, creating a unique economy where patience and timing matter as much as wealth.
Beyond the mermaid potions, the shop offers exclusive accessories unavailable anywhere else in Royale High. These include specialized seashell crowns, pearl necklaces with animated water drops, bioluminescent hair accessories that glow in dark areas, and oceanic wings that complement mermaid transformations perfectly. Each item integrates seamlessly with both mermaid and human forms, ensuring your investment remains valuable regardless of which form you choose.
Understanding the evening cycle is crucial for efficient quest completion. Since the timing follows your local midnight, plan your gaming sessions accordingly. Many successful players log in about 30 minutes before their local midnight, allowing time to prepare, locate the beach area, and position themselves optimally for bioluminescence collection.
While you receive one random elemental potion per quest completion, collecting all six requires strategic repetition. I recommend spreading your attempts across multiple days rather than grinding repeatedly in one session. This approach prevents burnout and maintains the magical feeling of each transformation. Keep a checklist of which potions you've obtained—without an in-game tracker, personal notes become essential.
Combine chest hunting with potion quests for maximum efficiency. Start by collecting all three treasure chests (netting you 400 diamonds and 230 XP), then use those diamonds to purchase complementary accessories from the Mermaid Treasure Shop. This creates a satisfying gameplay loop where exploration directly funds further customization.
The mermaid tails interact with various game elements in ways you might not expect. For instance, certain dance emotes trigger unique animations exclusive to mermaid forms, creating stunning visual displays during social gatherings. The sitting emotes, particularly "mermaid fins" and "mermaid side sit," showcase the tails beautifully and have been specifically fine-tuned for this update.
While mermaid tails replace leg items, creative players have discovered countless ways to build complete mermaid-themed outfits. Combining the new masculine arms option (designed specifically for mermen but available to all) with sleeveless tops creates powerful aquatic warrior looks. The 2D clothing system layers beautifully with tails, allowing for complex, detailed costumes that weren't possible with the original 2019 mermaid tails.
The update includes subtle improvements to photo mode specifically for showcasing mermaid transformations. Underwater shots now feature enhanced lighting that makes scales shimmer realistically, while surface-level photos capture the dramatic contrast between human and mermaid forms. The bioluminescent waters provide particularly stunning backdrops during evening hours.
This frustrating bug affects some players after collecting bioluminescence. The solution: ensure you're checking the correct inventory section in building mode. The bottle appears under a special category rather than standard furniture. If it's still missing, try leaving and re-entering your dorm, or switching servers while maintaining your quest progress.
Remember that bioluminescence only appears during the evening phase, which corresponds to your local midnight. If waters aren't glowing, you're likely attempting the quest at the wrong time. Additionally, graphics settings can affect visibility—medium or higher settings display the effect more clearly than low settings.
If you accidentally exit during the dorm placement phase or experience a disconnection, don't panic. The bottle should remain in your inventory when you return to Campus 4. Check your regular inventory first, then return to the beach area where the bottle originally spawned. In rare cases, you may need to wait for the next evening cycle to restart the quest.
The Royale High community's reaction has been overwhelmingly positive, with social media platforms exploding with mermaid transformation videos, treasure hunt guides, and creative outfit combinations. The official Royale High Discord server reports record activity levels, with dedicated channels for treasure locations and potion trading coordination.
Content creators on YouTube and TikTok have embraced the update enthusiastically, producing tutorials, speedruns, and artistic showcases that have garnered millions of views collectively. The hashtag #RoyaleHighMermaid has trended multiple times since the update's release, demonstrating the feature's viral appeal beyond the game's regular player base.
Reddit communities, particularly r/RoyaleHigh, have organized comprehensive wikis and tracking spreadsheets, showcasing the collaborative spirit the update has fostered. Players share strategies, celebrate rare potion collections, and help newcomers navigate the quest system—creating a supportive environment that exemplifies the best of gaming communities.
The evolution from 2019's mermaid tails to 2025's system represents a fundamental shift in game design philosophy. The original system treated mermaid tails as simple purchase items—spend diamonds, receive tail, transaction complete. While straightforward, this approach lacked engagement beyond the initial acquisition.
Today's system transforms mermaid tails into an experience rather than a product. The quest provides narrative context, the evening timing creates anticipation, and the random potion distribution encourages repeated engagement. Players invest time and effort rather than just currency, creating emotional attachment to their transformations.
The visual improvements are equally dramatic. Original tails featured basic textures and limited animation, while new potions include particle effects, dynamic scaling, and environmental interactions. The technical advancement showcases how far both Roblox and Royale High have evolved as gaming platforms.
Based on developer hints and code analysis, this mermaid update appears to be laying groundwork for expanded aquatic content. The infrastructure supporting underwater exploration, quest systems, and seasonal rotations suggests potential future additions like underwater kingdoms, mermaid-exclusive areas, or ocean-themed seasonal events.
The Goddess of Triumph potion's September exclusivity indicates a new approach to seasonal content, where specific transformations align with real-world awareness campaigns and celebrations. This model could extend to other months, creating a calendar of exclusive content that keeps players engaged year-round.
The official Royale High Twitter has teased that feedback from this update will influence future content directions, suggesting that player engagement with mermaid features could determine the scope of aquatic expansions.
To fully appreciate everything this update offers, approach it methodically but don't rush. Start with treasure chest collection for immediate rewards, then begin your first potion quest during an evening session when you can fully enjoy the atmospheric transformation. Document your journey through screenshots and videos—these memories become precious as the game continues evolving.
Experiment with different combinations of potions and accessories. Each elemental tail pairs uniquely with various outfit styles, and discovering your perfect combination becomes part of the adventure. Share your creations with the community and draw inspiration from others' innovative designs.
Remember that while exclusive items create urgency, the core mermaid content appears permanent. Don't stress about collecting everything immediately—spread your gameplay across multiple sessions to maintain enjoyment and prevent burnout.
If you're new to Royale High or returning after a hiatus, the mermaid update provides an excellent re-entry point. The treasure chests offer immediate rewards without requiring game knowledge, while the potion quest introduces you to various game mechanics naturally.
Start with chest hunting to build your diamond reserves. The 400 diamonds from the first chest alone provides enough currency to experiment with basic customization options. Use the XP from chests two and three to level up, unlocking additional game features and areas.
When attempting the potion quest, don't worry about getting specific elements initially. Each potion offers unique beauty, and random distribution means every player's collection journey differs. Focus on mastering the quest mechanics first, then worry about completing your collection.
No, mermaid potions cannot be traded between players. Each player must complete the quest individually to build their collection, ensuring everyone experiences the magical journey firsthand.
Treasure chests are one-time rewards per account. Once collected, they won't respawn, but new players can still find and claim them normally.
Active quest time ranges from 15-30 minutes, but you must wait for the evening phase. Factor in waiting time based on when you play relative to your local midnight.
Yes! You can collect all six elemental potions plus special editions. Each stays in your inventory permanently, allowing you to switch between different mermaid forms freely.
Core mermaid content appears permanent based on developer communications. However, special editions like the Goddess of Triumph potion follow seasonal availability, returning annually during specific months.
Players who purchased mermaid tails before November 2019 retain them permanently. These vintage tails work alongside new potions, giving veteran players access to both systems.
Mermaid tails are primarily cosmetic but include unique animations and emotes. They don't provide gameplay advantages, maintaining fairness while adding visual variety.
Mermaid transformations work across all Royale High realms, though they appear most spectacular in areas with water features, particularly Campus 4's enhanced beach environment.
The Royale High Mermaid Update of 2025 transcends typical game updates, delivering a transformative experience that rewards exploration, patience, and creativity. With 630+ diamonds and XP available from treasure chests, six unique elemental potions to collect, and an entire shop of exclusive accessories, this update provides weeks of engaging content that appeals to every type of player.
Whether you're hunting for hidden treasures, perfecting your mermaid transformation, or simply enjoying the enhanced beach atmosphere, this update represents Royale High at its absolute best—combining nostalgic elements with innovative mechanics that push the boundaries of what's possible in Roblox.
The community's enthusiastic response and the developers' commitment to expanding aquatic content suggests this is just the beginning of Royale High's underwater adventures. As we dive deeper into 2025, the mermaid update stands as a testament to how classic games can reinvent themselves while honoring their history.
Start your underwater journey today, claim those valuable treasure chests, and discover which elemental mermaid transformation speaks to your soul. The ocean's magic awaits, and with this comprehensive guide, you're fully equipped to make the most of every sparkling, bioluminescent moment.
Remember to bookmark this guide and check back regularly as we update with new discoveries and seasonal content. The Royale High Mermaid Update continues evolving, and we'll ensure you never miss a treasure, potion, or magical moment in your aquatic adventures.