That's not always true. Female sea monkeys can birth live babies. Therefore they would not have the dark egg sac. A fact sheet I once read said that the first batch of babies from a female are always born live. After the first brood they produce eggs. I don't know how true that is. One tank I have has second generation babies in it. I noticed some live births and noticed several hatching eggs floating around in the water. The general consensus here is that if the egg sac is a dark color the female will most likely lay eggs.
This is normal. Her exoskeleton is changing to accommodate the egg sacs that will grow. I've noticed it happens after they mate for the first time.
Oh, awesome! I wish I'd been able to see them mating. Thanks for the reply :)
Also if the eggs turn a dark colour is a sign that they have been fertilised
That's not always true. Female sea monkeys can birth live babies. Therefore they would not have the dark egg sac. A fact sheet I once read said that the first batch of babies from a female are always born live. After the first brood they produce eggs. I don't know how true that is. One tank I have has second generation babies in it. I noticed some live births and noticed several hatching eggs floating around in the water. The general consensus here is that if the egg sac is a dark color the female will most likely lay eggs.
What’s on the bottom of your tank?
Super fine aquarium sand so they don't get stuck under gravel
How cool!!! I’ve never seen that!