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How to Grow Sea Monkeys From a Kit

I bought my son a sea monkey kit, and we had a lot of fun growing them together. I put together a tutorial with tips on growing your own!

How to Grow Live Sea Monkeys

How to Grow Live Sea Monkeys

For my five-year-old son's birthday, I decided to get him some sea monkeys. I had the pleasure of owning sea monkeys when I was a kid, and I remember being very excited about them! I was happy to have them, and they actually did very well—until one day the little aquarium fell to the floor, along with everything in it. That was a very sad day for me, but now I have some more! Ahem, I mean, my son has sea monkeys, and I was more than happy to help him get them started.

New and Improved Sea Monkeys

These are better than the ones we had back in the day. These new and improved "hybrids" grow larger and are guaranteed to live up to two years. There are also lots of additional accessories and supplies to purchase for those with a sea monkey obsession. You can get medicine, banana treats, growth stimulator, mating powder, and lots more! You can even get a cool light-up aquarium for them now.

Many places have sea monkey kits for purchase. I got this one at Wal-Mart in the toy section. The kit does come with instructions, but I decided to go ahead and share them again here. You never know when someone might need instructions on how to grow these amazing live sea monkeys!

Contents of the Sea Monkey Kit

Contents of the Sea Monkey Kit

What You Need:

You will need the sea monkey kit, which is the actual tank; inside will be a small measuring spoon and three packets:

  • Packet 1: Water Purifier
  • Packet 2: Instant Live Eggs
  • Packet 3: Growth Food

In addition to the kit, you will need some distilled drinking water to put into the tank and a plastic spoon for mixing the water in your tank.

Step 1: Fill the Tank

  1. Take your empty tank and pour in the distilled water up to the "full" line that is on the side of the tank.
  2. Take packet #1, which is labeled Water Purifier, open it and pour all of it into the tank.
  3. Then take a clean plastic spoon and mix that around in the tank for about one minute.
  4. Put the lid on it and let it sit for a full 24 hours. (Also contained in packet #1 is a secret hatching catalyst!)

We didn't have a plastic spoon to mix ours, so we used a clean straw. I don't think it matters as long as whatever you use is clean and everything gets mixed up, but they do recommend using a plastic spoon.

Step 2: Add the Eggs

  1. Now that 24 hours have passed, open packet #2, which is the Instant Live Eggs, and pour the entire contents into the tank.
  2. After you empty the packet, stir briefly.
  3. Then you can hold your aquarium up to the sunlight or a strong light and you should see something that looks like wiggling little dots. Those are your baby sea monkeys . . . some will start hatching immediately!
  4. Now that you have added the instant live eggs, put the lid back on and enjoy seeing your sea monkeys grow. You don't have to do anything else for another five days.

Though you should see some hatch instantly, hatching times will vary depending on the temperature of the water and also the thickness of the eggshells around the sea monkeys. Thinner shells hatch quicker than thicker shells, and if the water is cold, it will take them longer to hatch. Read the helpful hints that come with the kit; it explains all the different things you will want to know.

Step 3: Feed the Sea Monkeys

Now that five days have passed since you added the live eggs in packet #2, it's time to start feeding your sea monkeys. Their food is what is in packet #3.

  1. Take the double-ended measuring spoon that came with the kit. You will notice it has a small measuring spoon on one end and a larger one on the other.
  2. Use the smaller measuring scoop to measure out the food for your sea monkeys. On the package, it says to feed them one level small scoop of food from packet #3 and put that into the tank.
  3. After this, according to my research online, it's best to feed them every five to seven days.

Discrepancies Between the Food Package and the Website

On the back of packet #3 (food package), it says to feed them every two days, but after researching online, I noticed that most people feed their sea monkeys every 5 to 7 days. Also, on the sea monkey website, it says to give only half a small scoop to the sea monkeys each feeding.

I don't know why the package says one level small scoop and the website says half a small scoop, but I've decided to just give our sea monkeys half a small scoop every week. It seems it's better to underfeed than overfeed them, and ours seem to be doing fine with it. Of course, it's up to you about how much you want to feed your own; I just wanted to point out the discrepancies that I found and what seems to be working best for us so far.

Continued Care for Sea Monkeys

Cloudy Tank

Sometimes, the water may get cloudy in the tank. If this happens, it means there is too much food in the tank. Simply stop feeding them until it clears up, and then start feeding them once a week.

Where to Get More Food

The food in the packet should last a good while, but if you start to run low, you can purchase more sea monkey food at pet shops or online. You can also get anything you need for them (plus additional supplies) at the official sea monkey website.

Fun Facts About Sea Monkeys

  • Sea monkeys are born with one eye, but as they grow, they form two more eyes and end up shedding the one baby eye eventually. So, according to which stage of life they are currently in, they could have either one, two, or three eyes!
  • Many think sea monkeys are just brine shrimp, but they are actually not the same. They are in the same family but do have differences. Brine shrimp do not live near as long as sea monkeys.
  • Male and female sea monkeys mate to make babies, just like other animal species, but if a male is not present, some females can make babies without a male. The process is called meiotic parthenogenesis.
  • Sea monkeys actually breathe through their feet!
  • Sea monkeys live up to two years and can get up to 3/4 inches long.

I hope you have found this useful. You can check out YouTube for lots of sea monkey videos. Enjoy your sea monkeys!


FrodogenicFrogs on August 18, 2019:

Thank you for this tut, the closest I’ve come to seeing a sea monkey kit down here is seeing some spawning process taking place at the beach one afternoon several years ago now! The whole bay was thick with micro shell like material and wriggling clouds of hatchlings!

I’ve always wanted to know what do sea monkeys look like? Are they monkey like at all

Harry on June 30, 2019:

Can i keep sea monkeys in glass tank

Mark E. on August 05, 2018:

Do not use tap water under any circumstances. Boiling water will kill bacteria, viruses and protozoa but will not get rid of any chemicals commonly found in municipal tap water such as fluoride, chlorine, ammonia, etc. For that you would need a reverse osmosis filter.

If you do not have distilled or bottled water then rain water would be your next best option (and yes I would boil it just to be safe).

I had a sea monkey before and a sea dragon. on June 02, 2016:

I had a sea monkey before and a sea dragon

Jamie Brock (author) from Texas on April 01, 2016:

Kristen Howe- Thank you so much. I really appreciate your comment! Please forgive my late reply. I just loved my Sea Monkeys. I can't believe they are still around. Hope you are having a fantastic day!

Jamie Brock (author) from Texas on April 01, 2016:

brsmom68- Oh yes..the memories. Glad you enjoyed the hub!

Diane Ziomek from Alberta, Canada on February 26, 2016:

I had them as a kid as well; so naturally had to buy them for my kids when they were younger. They were fun for me when I was a kid and I remember checking to see if they were there every day. Oh, the memories. :) Great hub that brought back a piece of my childhood.

Kristen Howe from Northeast Ohio on February 26, 2016:

Congrats on HOTD, Jamie. How nostalgic! I never had them before. Thanks for sharing this hub about it.

TANJIM ARAFAT SAJIB from Bangladesh on February 12, 2016:

A great idea for entertaining the child. Many children don’t even know the name of sea monkeys. With this hub, that memories of childhood has also perished. In the age of modern technology, the procedures are also easy and wide in range. So you can gift your child with sea monkeys in different occasions and take part with them in making sea monkeys. Thus you will be able to build up a good and close relationship with your child which is becoming rare nowadays. So go to the nearest shop around you, buy the things needed for the task and enjoy with your child.

Jamie Brock (author) from Texas on June 16, 2013:

maja dali- You are welcome.. Thank you for reading :)

Jamie Brock (author) from Texas on March 11, 2013:

toknowinfo- Thanks for dropping by and have fun with your sea monkeys :)

toknowinfo on March 10, 2013:

I never knew about sea monkeys. They sound interesting and i think you inspired me to try this. Thanks for the great tips.

Jamie Brock (author) from Texas on March 01, 2013:

agusfanani- Thanks for dropping by... I'm so glad you enjoyed this! Sea monkeys are fascinating little creatures for sure. :0)

Jamie Brock (author) from Texas on March 01, 2013:

kidscrafts- Hopefully you will have some grand kids soon :) If you get tired of waiting you could always get a kit and grow some sea monkeys just for practice ;0)

agusfanani from Indonesia on February 28, 2013:

I've never heard about Sea Monkeys but I find it very interesting and educative so that children learn about patience and some scientific terms like parthenogenesis. This pet has very interesting fun facts that made me keep smiling when I read them .

kidscrafts from Ottawa, Canada on February 26, 2013:

Who knows... may be when I will have grandchildren because my kids are too old for that now!

Jamie Brock (author) from Texas on February 26, 2013:

kidscrafts- Thank you for the votes up and positive feedback :) Yes, he did enjoy getting them started.. I don't think he quite understood what was going to happen but he was excited to see them swimming all around the tank a while afterwards :) From what I understand, they can mate and I've also learned now that the adults lay eggs before they die so I guess they can just keep going and going! Thank you so much for dropping by and I'm glad to hear that this hub sparked your interest :) Maybe there will be some sea monkeys in your future ?!

Jamie Brock (author) from Texas on February 26, 2013:

Stephanie Henkel- Oh yes, it was a lot of fun... and it's fun watching them grow. I'm surprised at how fast they have grown.. We could easily see them swimming around the tank about 4 days after we added the "live eggs"... I don't remember them growing this fast when I had them years before! Thank you so much for the positive feedback, votes and for sharing this :)

Jamie Brock (author) from Texas on February 26, 2013:

carol- Thank you so much for the sweet comment, votes up and pin! My son loves them.. but I think my husband loves them more :)

Jamie Brock (author) from Texas on February 26, 2013:

lady rain- Wow, that is awesome! I didn't know the adults laid eggs before they died.. Sounds like we don't ever have to run out of sea monkeys if we don't want to. I did gather from my research they don't require much feeding and that they are pretty self sufficient. Thank you for sharing this info! It's nice to get some first hand advice and information from someone experienced with raising sea monkeys. Thank you!!

Jamie Brock (author) from Texas on February 26, 2013:

Mhatter99- You are so welcome.. thank you for dropping by!

Jamie Brock (author) from Texas on February 26, 2013:

prasetio30- Thank you so much for the votes up! I'm glad you enjoyed reading about the sea monkeys.. I agree, this is a good one for kids, for sure! It's great to "see" you.. and hope all is well :)

Jamie Brock (author) from Texas on February 26, 2013:

vespawoolf- I know what you mean.. if only they could look like they do on the packaging! I never did know what they were exactly either until I researched for this hub. Like you, I became attached to them and I was horrified that day years ago when the tank fell and emptied onto the carpet :( When I saw them at WalMart, I just HAD to get them... so it has been fun reliving the experience with my son. Glad I could bring back some nice memories for you :)

Jamie Brock (author) from Texas on February 26, 2013:

torrilynn- You are welcome and thank you for the votes up! I'm glad you enjoyed the hub :)

Jamie Brock (author) from Texas on February 26, 2013:

donnah75- Thank you :) Yes, I think your nephews would probably love sea monkeys. I didn't mention in the hub but they are pretty inexpensive too. You can get the whole kit for around 5 bucks. Glad you enjoyed the hub.. thank you for dropping by!

Jamie Brock (author) from Texas on February 26, 2013:

Bill, Thank you so much! I had these when I was little and when I saw them at Walmart I know I just HAD to get them for my little one. At first he wasn't impressed but now that they are visible and swimming in the tank, he has taken more interest :) I am going to post a pic as soon as I can after they get a bit bigger... just to give readers an idea what they look like. I wish they actually did look like what is on the packaging, LOL! Thank you so much for dropping by... hope you had a wonderful weekend as well!

kidscrafts from Ottawa, Canada on February 24, 2013:

Very interesting Jamie! Your son must have love the experience to start up everything! So if I understand well, the life expectancy of your sea monkeys is 2 years but you might get some babies so your son might enjoy to see a few generations of sea monkeys?!?

Voted up and interesting!

Stephanie Henkel from USA on February 24, 2013:

This must be a great project for kids, and fun for you, too! We've never tried raising sea monkeys, but maybe we should! Great instructions and very nice layout and photographs make your article easy to read and informative!

Voted up and shared!

carol stanley from Arizona on February 24, 2013:

What a great idea here to share. This looks fun and what a great experience for kids. And as always you do such a good job. Voting up and pinning.

lady rain from Australia on February 24, 2013:

I have three tanks of sea monkeys which I have been keeping for several years. The adults sea monkeys lay eggs before they die and the babies usually hatch in the warmer months. I don't feed them very often as the sea monkeys eat the algae growing in the tank. The tanks are like mini eco systems on their own.. pretty amazing!

Martin Kloess from San Francisco on February 23, 2013:

Thank you for this. I did these with my kids.

prasetio30 from malang-indonesia on February 23, 2013:

Wow....Very inspiring hub. I had never heard about sea monkey before reading this hub. I think kids will love it very much. Thanks for writing and share with us. Voted up!


Vespa Woolf from Peru, South America on February 23, 2013:

I also had sea monkeys when I was a kid and loved them. At first I was disappointed they weren't an underwater royal kingdom as advertised on the box. Still, I grew attached to the transparent little creatures. I always thought they were brine shrimp. How interesting they're in the same family but not exactly the same thing. This brings back nice memories. What a fun gift for the kids!

torrilynn on February 23, 2013:

jamie brock, nice article you have here about growing sea monkeys. i didn't know what they were until i read your article. thanks and voted up.

Donna Hilbrandt from Upstate New York on February 23, 2013:

I didn't know what these were either, although I have heard of them over the years. This sounds like a fun gift for kids. I have six nephews. I'm putting this on the gift ideas list. Great hub!

Bill Holland from Olympia, WA on February 23, 2013:

I didn't even know what they were. I've never heard of them. I must live in some sort of vacuum, out of touch with the real world. LOL How fascinating, and what a cool project for a kid. Well done, Jamie, and thanks for the education. Have a great weekend my friend.