---
product_id: 149849807
title: "Sea-Monkeys Magic Castle"
brand: "sea monkeys"
price: "£33.34"
currency: GBP
in_stock: true
reviews_count: 13
category: "Sea Monkeys"
url: https://www.desertcart.co.uk/products/149849807-sea-monkeys-magic-castle
store_origin: GB
region: United Kingdom
---

# 2-year guaranteed lifespan Unique Magic Castle tank Instant hatching dry eggs Sea-Monkeys Magic Castle

**Brand:** sea monkeys
**Price:** £33.34
**Availability:** ✅ In Stock

## Summary

> 🏰 Dive into the world’s only Instant Pets®—where magic meets micro-life!

## Quick Answers

- **What is this?** Sea-Monkeys Magic Castle by sea monkeys
- **How much does it cost?** £33.34 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.uk](https://www.desertcart.co.uk/products/149849807-sea-monkeys-magic-castle)

## Best For

- sea monkeys enthusiasts

## Why This Product

- Trusted sea monkeys brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Science Meets Nostalgia:** A fun, educational hobby that connects you to a timeless classic with a modern twist.
- • **Instant Life, Instant Wonder:** Watch your Sea-Monkeys hatch from cryptobiotic eggs in minutes—science meets magic!
- • **Perfect for Busy Millennials:** Minimal care, no water changes, just add water and feed—ideal for your dynamic lifestyle.
- • **Exclusive Magic Castle Habitat:** A stylish, compact tank designed to showcase your aquatic micro-kingdom with flair.
- • **Sustainable 2-Year Companionship:** Enjoy up to two years of low-maintenance, living pets that evolve and multiply.

## Overview

Sea-Monkeys® Magic Castle is a unique instant pet kit featuring cryptobiotic dry eggs that hatch upon adding water, housed in a stylish plastic tank. Designed for ages 6+, these resilient creatures thrive for up to two years with minimal care, offering a captivating blend of science, nostalgia, and low-maintenance companionship perfect for busy professionals seeking a quirky, living desk companion.

## Description

desertcart.com: Sea-Monkeys® Magic Castle - World's Only Instant Pets® - Ages 6+ (Pack of 1) : Toys & Games

Review: Hard to see, but they're there! - Dont be so quick to throw them away, they're there, you just cant see them. There are a few things you have to keep in mind to raise these. - They need warm temperatures, at least 70 degrees F, too chilly and they will not thrive and even die. - They need oxygen. Either use the little pump thing it came with to blow bubbles in the tank( google to find out how often), or if youre too lazy like me, get a pump with an air stone, and put on the lowest setting. Too much agitation will kill them. - They dont over eat, what kills them is suffocation. If the water is murky, thats too much food, and they will suffocate, especially if you're not blowing bubbles or dont have a bubbler with a pump. I usually feed them when water is clear. I thought mine died off, but then I saw 4 all of a sudden. They started having babies, now I have a ton of them. I just leave them be. I top off the water up to line, thats to keep the salinity level constant. Make sure pump is working and they get enough oxygen. I dont have them by a window, but I do use a grow light. They stay at 76-78 degrees, I keep them by the tv, that keeps them warm. I feed them about every other day, not too much. You have to play it by ear, and depends on how much critters you have in your tank. I got the Magic Castle on April 13, and it is now June 13. So far they are thriving. I got the Sea Monkeys on Mars June 5, so they're just starting to show up. Over all they are easy to take care of. No need for water changes. Don't remove the muck that accumulates at the bottom of their tank, they need that. The dead sea monkey are full of vitamins and minerals, that the live ones need. There's also eggs in there. Dont change the water either, you'll end up throwing away the babies that you can't see. I noticed that a lot of the low reviews were during the winter months. The reason why they either didnt hatch or died off was probably because they were cold. They need warmth, at least 76-80 degrees F. These arent toys, they are living beings with specific needs to live and thrive.
Review: Fun pet! - My sea monkey tank has been setup for 3 weeks now and they’re starting to get bigger! Such a fun and easy pet to own. My younger siblings enjoy watching them. Instructions are easy to follow. I’d say it’s a pretty fair price and would make an awesome gift for someone!

## Features

- Kit that contains a PMS plastic tank, food packet, water purifier and sea monkey eggs.
- The tank needs to be filled with water to fill line.
- The sea monkey eggs are a dry powder because of cryptobiosis, a state of suspended annimation that occurs naturally in Sea-Monkeys in order to help them survive until ideal conditions appear.
- Sea Monkeys Are Assured To Live (And Rule Their Domain) For 2 Years!

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B07T1WGMKQ |
| Best Sellers Rank | #52,609 in Toys & Games ( See Top 100 in Toys & Games ) #46 in Habitat Science Kits |
| Brand Name | Sea Monkeys |
| Color | Green |
| Customer Reviews | 4.0 4.0 out of 5 stars (1,464) |
| Global Trade Identification Number | 04894166232308 |
| Included Components | toy |
| Item Type Name | Toy |
| Item Weight | 1.8 Ounces |
| Manufacturer | Sea Monkey's |
| Manufacturer Part Number | DI23230 |
| Material Type | Plastic |
| Model Number | DI23230 |
| Product Style | Magic castle |

## Product Details

- **Brand:** Sea Monkeys
- **Color:** Green
- **Global Trade Identification Number:** 04894166232308
- **Included Components:** toy
- **Item Weight:** 1.8 Ounces
- **Manufacturer:** Sea Monkey's
- **Material:** Plastic
- **Number of Items:** 1
- **Style:** Magic castle

## Images

![Sea-Monkeys Magic Castle - Image 1](https://m.media-amazon.com/images/I/71B9Vn96BEL.jpg)
![Sea-Monkeys Magic Castle - Image 2](https://m.media-amazon.com/images/I/71EK3r2UMwL.jpg)
![Sea-Monkeys Magic Castle - Image 3](https://m.media-amazon.com/images/I/81cG71nrLCL.jpg)
![Sea-Monkeys Magic Castle - Image 4](https://m.media-amazon.com/images/I/61aXdAKTC0L.jpg)
![Sea-Monkeys Magic Castle - Image 5](https://m.media-amazon.com/images/I/81McVHL6EDL.jpg)

## Questions & Answers

**Q: Crystal blue color or pink and blue? Photos show both**
A: Crystal blue.

**Q: How much does it grow?**
A: They end up being about the size of an ant. There are dozens of them thay have grown, and also seems they are breeding.

**Q: Does it last ?**
A: Not really. They do hatch.

**Q: I do not have a table to put this on in front of a window. Can I put these outside on my porch during the day?**
A: No! They will die keep indoors

## Customer Reviews

### ⭐⭐⭐⭐⭐ Hard to see, but they're there!
*by M***A on June 12, 2023*

Dont be so quick to throw them away, they're there, you just cant see them. There are a few things you have to keep in mind to raise these. - They need warm temperatures, at least 70 degrees F, too chilly and they will not thrive and even die. - They need oxygen. Either use the little pump thing it came with to blow bubbles in the tank( google to find out how often), or if youre too lazy like me, get a pump with an air stone, and put on the lowest setting. Too much agitation will kill them. - They dont over eat, what kills them is suffocation. If the water is murky, thats too much food, and they will suffocate, especially if you're not blowing bubbles or dont have a bubbler with a pump. I usually feed them when water is clear. I thought mine died off, but then I saw 4 all of a sudden. They started having babies, now I have a ton of them. I just leave them be. I top off the water up to line, thats to keep the salinity level constant. Make sure pump is working and they get enough oxygen. I dont have them by a window, but I do use a grow light. They stay at 76-78 degrees, I keep them by the tv, that keeps them warm. I feed them about every other day, not too much. You have to play it by ear, and depends on how much critters you have in your tank. I got the Magic Castle on April 13, and it is now June 13. So far they are thriving. I got the Sea Monkeys on Mars June 5, so they're just starting to show up. Over all they are easy to take care of. No need for water changes. Don't remove the muck that accumulates at the bottom of their tank, they need that. The dead sea monkey are full of vitamins and minerals, that the live ones need. There's also eggs in there. Dont change the water either, you'll end up throwing away the babies that you can't see. I noticed that a lot of the low reviews were during the winter months. The reason why they either didnt hatch or died off was probably because they were cold. They need warmth, at least 76-80 degrees F. These arent toys, they are living beings with specific needs to live and thrive.

### ⭐⭐⭐⭐⭐ Fun pet!
*by I***S on March 3, 2026*

My sea monkey tank has been setup for 3 weeks now and they’re starting to get bigger! Such a fun and easy pet to own. My younger siblings enjoy watching them. Instructions are easy to follow. I’d say it’s a pretty fair price and would make an awesome gift for someone!

### ⭐ Very disappointed
*by J***N on March 12, 2026*

90% of them didn’t hatch and the ones that did lived 2 days. 😢 we followed instructions to a T and have had others live over 6 months. Very disappointed

## Frequently Bought Together

- Sea-Monkeys® Magic Castle - World's Only Instant Pets® - Ages 6+ (Pack of 1)
- Animagic Aqua Dragons Light-Up Deep Sea Habitat | Build an Aquatic Ecosystem, Watch Prehistoric Pets Hatch & Grow Science Kit | Ages 6+ (Packaging may vary)
- Sea-Monkeys Magiquarium - World's Easiest, No-Mess Pet - Grow Your Own Pet in a Light-Up Aquarium - Ages 6 and Up - One Kit

---

## Why Shop on Desertcart?

- 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016
- 🌍 **Shop Globally** — Access 737+ million products across 21 categories
- 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price
- 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members)
- 🔒 **Secure Payments** — Trusted payment options with buyer protection
- ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews

**Shop now:** [https://www.desertcart.co.uk/products/149849807-sea-monkeys-magic-castle](https://www.desertcart.co.uk/products/149849807-sea-monkeys-magic-castle)

---

*Product available on Desertcart United Kingdom*
*Store origin: GB*
*Last updated: 2026-05-03*