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Sea-Monkeys

life science Maturity 5-7 Next article →

Sea-Monkeys are small pets that people keep in tanks. They are actually tiny brine shrimp called Artemia. People buy them as eggs in a special kit. These kits often come with three pouches and instructions. The name comes from their salt-water home. It also comes from their tails looking like monkey tails. They are fun to watch as they swim.

Artemia salina 2
Artemia salina 2

Growing a colony follows a specific way it works. First, you add a Water Purifier packet to a tank. This packet has salt, eggs, and a water conditioner. You must wait 24 hours before adding more. Next, you add a packet called Instant Life Eggs. This has more eggs, food, yeast, and salt. Soon, the eggs hatch into nauplius larvae. These are the young shrimp.

Artemia salina 2
Artemia salina 2

Harold von Braunhut created this product in 1957. He worked with a biologist named Anthony D'Agostino. Together, they made a mix of nutrients for the water. At first, the product was called Instant Life. It cost only 49 cents back then. Von Braunhut changed the name to Sea-Monkeys in 1962. He used many comic book ads to sell them.

Artemia salina 2
Artemia salina 2

These shrimp have a very special way of surviving. They use cryptobiosis, which is a state of apparent lifelessness. This lets them survive when their water pools dry up. The eggs can stay dormant for many years. They only wake up when they touch water. The whole life cycle takes 8 to 10 weeks. In a home, they might live for five years.

Artemia salina 2
Artemia salina 2

Scientists use these shrimp to study many things. They study genetics and how living things grow. These tiny animals even traveled into space. Astronaut John Glenn took them on the Space Shuttle Discovery in 1998. They hatched well after their nine days in space. However, eggs sent to the Moon faced a hard job. Cosmic rays caused changes in how some eggs grew.

Artemia salina 2
Artemia salina 2
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