- Categories:
- Animal
- Tags:
- AppreciationHobbyPet
- Where:
- United States
- Date change rule:
- Every May 16
- Holiday emoji:
- 🦐
National Sea Monkey Day splashes onto the calendar every May 16, celebrating the tiny, fascinating brine shrimp sold as novelty pets. These aquatic creatures, first marketed in the 1960s, have captivated generations with their unique life cycle and easy care. Dive into the history of these miniature marvels, learn how to raise your own, and share your Sea Monkey stories today!
Want to sponsor National Sea Monkey Day? Learn how
Expected National Sea Monkey Day Deals
While we await official 2027 promotions to drop, history shows that retailers often feature deals on novelty pet kits and science toys around National Sea Monkey Day. Expect online stores like Amazon and hobby shops to offer discounts on Sea-Monkeys starter kits, refill packs, and accessories. Educational toy brands such as Uncle Milton or Discovery Kids might also have sales on related aquatic or insect habitats. Keep an eye out at major retailers like Walmart and Target for price drops on these unique pets. We will update this page with confirmed live deals as May 16 approaches.
Platform Guide for National Sea Monkey Day
TikTok
Tag @www.nationaltoday.com and use #SeaMonkeyDay. Film a time-lapse of your Sea Monkeys hatching or growing, or share creative ways you’ve decorated their habitat.
Tag @nationaltoday_ and use #NationalSeaMonkeyDay. Post captivating close-up photos or short videos of your Sea Monkeys swimming, showcasing their unique movements.
Mention National Today (facebook.com/nationaltoday) and use #SeaMonkeys. Share nostalgic stories of your first Sea Monkey kit and ask others to share their fond memories.
National Sea Monkey Day Hero
Harold von Braunhut
History of National Sea Monkey Day
It was back in 1957 when, during a visit to a pet store, Harold von Braunhut became fascinated with a species of brine shrimp called Artemia salina, which was being sold as pet food. He later partnered up with a marine biologist, Dr. Anthony D’Agostino, to bring the sea monkey to life. Together, they developed a proper mix of nutrients and chemicals in dry form that can be added to plain water to create an environment conducive to the shrimp’s growth.
Sea Monkeys were initially sold under the name ‘Instant Life’ and later given the name ‘Sea Monkeys’ owing to the fact that they have a monkey-tail-like shape, making them resemble monkeys of the sea rather than shrimps. They were a very popular pet from the ’60s onwards and they usually came with a special mini aquarium that was used to hatch them and for them to live and grow in.
These small creatures have gained much popularity over the years and even found a name in pop culture. They’ve been showcased in television shows including “South Park,” “The Simpsons,” and “Desperate Housewives.”
National Sea Monkey Day timeline
After the popularization of ant farms a year earlier by Milton Levine, Harold von Braunhut invents a new unusual pet, Sea Monkeys.
Harold von Braunhut changes the name of these creatures from ‘Instant Life’ to ‘Sea Monkeys.’
Harold von Braunhut is granted a patent for the process of developing Sea Monkeys.
Sea Monkeys travel to space with astronaut John Glenn aboard Space Shuttle Discovery.
How Businesses Can Celebrate National Sea Monkey Day
Local businesses can tap into the nostalgia and wonder of National Sea Monkey Day. Toy stores and hobby shops can create eye-catching displays featuring Sea-Monkeys kits and other unique aquatic pets, perhaps offering a ‘buy one, get one’ deal on refills. Science museums or educational centers could host special workshops on brine shrimp biology or the history of novelty pets. Even pet stores could highlight the ease and fun of these low-maintenance creatures, attracting new customers looking for an unconventional pet experience.
National Sea Monkey Day FAQs
When is National Sea Monkey Day?
In 2027, National Sea Monkey Day is observed on Sunday, May 16. This annual celebration always lands on the same date, providing a consistent day to appreciate these unique creatures.
What are Sea Monkeys?
Essentially a type of brine shrimp, Sea Monkeys are sold in kits that allow users to ‘grow’ their own aquatic pets. They are known for their ability to enter cryptobiosis (a state of suspended animation) as eggs, allowing them to be stored dry for years.
How long do Sea Monkeys live?
The average lifespan of a Sea Monkey is generally between a few weeks to several months, with some robust individuals reaching up to two years. Consistent care and a stable environment are key factors in their longevity.
What do Sea Monkeys eat?
Their diet primarily consists of the specialized food provided in their kits, which usually contains a blend of algae and yeast. They filter these tiny particles from the water using their feathery legs, making them easy to feed.
How To Celebrate National Sea Monkey Day
Educate children about pet care
Sea Monkeys are relatively easy pets to manage and they can be used as a great way to teach children about pet care. Get some Sea Monkeys to educate your children and instill a caring nature in them towards pets.
Get your own Sea Monkeys
Have you been contemplating getting a pet? If you’re looking for a low-maintenance pet, use this day to get some Sea Monkeys and watch them grow.
Share a photo of your Sea Monkeys
Do you already have some sea monkeys floating around? Firstly, pamper these creatures on this day dedicated to them. Secondly, take cute and adorable photos of your Sea Monkeys and upload them on social media using the hashtag #NationalSeaMonkeyDay.
5 Facts About Sea Monkeys That Will Blow Your Mind
Sea Monkeys’ own television show
They had their own TV show called “The Amazing Live Sea Monkeys,” which focused on three microscopic Sea Monkeys who were enlarged to human size by a crazy professor.
Sea Monkeys’ anatomy
Sea Monkeys are born with one eye and later they grow three eyes and breathe through their feet.
Sea Monkeys are attracted to light
If you shine a flashlight in a tank filled with Sea Monkeys, they will swim towards the light.
Sea Monkeys’ diet
Sea Monkeys eat the algae in their tank so you don’t have to clean it out unless it gets really dirty in there.
Sea Monkeys’ nature
Sea Monkeys are loving creatures who show their affection for one another by kissing and cuddling.
Why We Love National Sea Monkey Day
Sea Monkeys aren’t harmful to the environment
Sea Monkeys are so tiny and lovable. They aren’t even harmful to the environment. As a matter of fact, they cannot survive in water that hasn’t been prepared with Harold von Braunhut's formula. Don’t these little marvels deserve a day of their own?
Sea Monkeys are great pets
They were initially marketed as “instant pets” before they officially got the name Sea Monkeys. They’re easy to maintain, need to be fed only once a week, and require only basic care.
Sea Monkeys don’t exist in nature
Isn’t it a marvel that Sea Monkeys were actually made and don’t exist in nature? They were bred from different brine shrimp species through a scientific process. Sea Monkeys actually belong to the species called Artemia NYOS, which is named after the New York Oceanic Society where they were made.

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