Steal an Egg Update 12 added the Alien biome, and it changed how we spend our nights in the game. The biggest surprise is the Alien Tidal Surge. This rare night event floods the biome and unlocks five pets you cannot find anywhere else. One of them is a Divine pet that earns more than anything else in the biome. Let us walk through how the event works and how we can chase it smartly.
What Is the Alien Tidal Surge in Steal an Egg
The Alien Tidal Surge is a random event inside the Alien biome. Every night, it carries a 10% chance of a flood. When it triggers, the whole biome sinks underwater in every server at once. The flood stays until the next egg reset, which takes about five minutes. That window is short, so we need to be ready before it starts.
The biome holds eight regular pets, and the surge adds five more. That brings the total to 13 pets. A Divine guardian called Obsidian Rex watches over the area, and the biome also hides a fishing lagoon and a locked Relic Gate.
How the Alien Tidal Surge Works
Once the flood arrives, two things change. Five flooded eggs spawn around the biome, and we can swim in to grab them. Fishing changes too. About 28% of our catches in the biome are Alien eggs. During a surge, each of those turns into a flooded egg instead of a normal one.
This second part is the real trick. Many players run to the spawned eggs and forget about their rod. We think the smarter play is to do both. Grab the nearest flooded egg first, then keep fishing until the water drains. Every extra flooded egg gives us another roll at the rare pets.
All Alien Tidal Surge Pets and Drop Rates
Each flooded egg rolls from the same five-pet pool. The odds lean heavily toward the common ones. Here is the full list with rarity, base income, and chance.
- Jellynova: Cosmic, $100M/s, 73%
- Flarefish: Cosmic, $300M/s, 20%
- Tideler: Secret, $2.8B/s, 5%
- Abyssjaw: Eternal, $5B/s, 1.9%
- Prismare: Divine, $20B/s, 0.1%
Prismare is the prize. It earns $20B per second, which beats Obsidian Rex at $12.5B per second. But a 0.1% chance means roughly one hit in 1,000 flooded eggs. We should treat it as a long-term goal, not a quick win.
Not every pet needs a surge, though. Jellynova unlocks through the Fishing Milestone at 1,500 fish. Abyssjaw arrives at 5,000 fish. So the surge matters most for Flarefish, Tideler, and Prismare. We can farm milestones for the rest and save our patience for the flood.
Best Way to Farm the Alien Tidal Surge
Location is our first decision. The Alien Lagoon never sends us home at night, so it feels perfect for long fishing. But the surge only floods the main Alien biome. If we sit in the Lagoon, we miss it. We should fish in the biome’s water and stay there through the night.
Grab the Alien Rod from the Alien Ferryman, or use the Ghost Fishing Rod from the Halloween update. Fishing in the biome gives 5 to 11 Void Pearls about 62% of the time. We also get Alien eggs at 28%, a Dark Matter mutation drop at 8%, and a relic at 2%. Those catches keep paying off while we wait for a flood, so no cast goes to waste.
Here are the habits that help us most.
- Stay in the Alien biome through the night instead of heading home.
- Watch for the flood message and react at once.
- Grab a flooded egg first, then keep casting.
- Fill the casting meter on every throw for better luck.
- Clear your pen and equip slots before the night starts.
Fit the Surge Around the Cosmic Eclipse
The Tidal Surge is random, but the Cosmic Eclipse runs on a clock. It starts in the Alien Lagoon at the 25- and 55-minute marks of every hour. Players across all servers share 750 Nebuloth Krakens in each event. We unlock the Lagoon by talking to the Alien Ferryman after we catch 20 fish. For the full breakdown, read our Nebuloth Kraken in Steal an Egg guide for the schedule and tips.
Our suggestion is simple. Fish in the main biome between events and watch for floods. Move to the Lagoon a few minutes before:25 or:55. After the event, head back to the biome. This rhythm covers both chances without wasting time.
What to Do With Your Tidal Surge Pets
Prismare and Obsidian Rex are both Divine, but only Obsidian Rex joins the new fusion. The Relic Gate needs seven relics from fishing. They come in red, orange, yellow, green, blue, purple, and pink. Behind the gate, we can fuse Obsidian Rex and Nebuloth Kraken into Xenorath.
Relics drop at 2% per catch, so we should expect a few hundred casts. That sounds harsh, but every cast also gives Void Pearls and eggs. We can trade 1,750 Void Pearls for a Dark Matter mutation, which adds a 2.5x multiplier. In theory, a mutated Prismare could reach about $50B per second. That is the dream pet for any pen.
Final Thoughts
The Alien Tidal Surge rewards patience more than skill. We cannot force a flood, but we can stand in the right place with a rod ready. Stay in the biome, grab every flooded egg, and let the milestones cover the easy pets. Then add the Cosmic Eclipse to your routine, and one session can chase three goals at once. Good luck out there, and may your next night bring a flood.
Also Read: Nebuloth Kraken Steal an Egg – How to Get It, Schedule, and Tips
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I am Tanmoy Nath, a gaming writer and Roblox enthusiast with over 6 years of experience covering online games. I have been playing Roblox since 2022, with a deep focus on games like Fisch, Grow a Garden, Paradox, and popular tycoon titles. At Fans First Booyah!, I write beginner guides, tier lists, and update breakdowns – all based on hands-on gameplay rather than secondhand information. My aim is to help both new and experienced Roblox players get the most out of every game they pick up.