Kids' Nature Blog

Observe-O-Hatchery: Triops

One of my triops at about 3 weeks old

Triops are crustaceans living fossils: they lived in the Triassic and Jurassic period, and have not changed much since then!

There about ten different kinds: Triops Newberyi, Triops Australiensis, Triops Cancriformis, and Triops Longicaudatus, and others.

They have three eyes: two of them see, the other tells the crustacean if it is day or night. This is similar to the Horseshoe crab (which is an arthropod living fossil from the late Ordovician period and has NINE eyes in total).

We got triops’ eggs and sand to hatch. 24 hours after we put them in the water, three eggs hatched! The triops were VERY SMALL, less than 1 millimeter long. We watched them under the microscope:

5 day old triops swimming in a drop of water

They grew so fast! This one is about 10 days old. It is a very fast swimmer, too.

Juvenile triops swimming in a tank

I think the species we got is Triops Australiensis. Because they have a light green shell and a carapace with a round and flat middle part.

Triops at about 3 weeks old swimming and digging

They need limestone in the water to build their exoskeleton (carapace).

Triops digging together

They are always digging! They have a lot of energy.

Triops are always digging! (Note egg sacks on the one on the right!)

Triops live in 100 percent natural spring water, and eat other crustaceans, carrots, boiled cauliflower, fish, and special dry food. They are always hungry! They dig in the sand to find food.

Triops at about 4 weeks.

When they grew about 1 inch long, we had to transfer them to a big aquarium.

Triops playing with thermometer in the new tank

They loved exploring their new home! They especially liked the limestone castle and the bubbler (look, triops is covered in air bubbles!).

Triops with their new limestone castle

Triops are very curious and have a lot of energy!

Triops Australiensis pooping

After about 6 weeks, the female triops laid eggs and died. We left the eggs in the water to see what will happen. We observed them for several days, and could not see anything. But then we noticed the tiny little creatures that HATCHED!

Eggs (little orange balls in the middle) and little creatures (white specks, the largest one is at the top center of the picture)

See my next post about the little ones!!

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3 Comments

  1. Alexandra

    Great photos and videos! It turns out that triops are very ancient.

  2. Steve

    Loved the pictures and videos! The first picture is fit for a screensaver! Great job on the research, I learn a lot in just one visit!

  3. Zoe

    Great job, Jonathan!

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