Triops aka “Aquasaurs” are small prehistoric creatures that can remain in suspended animation for a long time. They hatch out once they get wet and grow quickly. In that way they are like sea monkeys, but they grow much much bigger.
Here is a video taken on 2020-03-24. The Triops have hatched out and they were finally big enough to see:
Here they are four days later:
And finally here they are today, just eight days from the first video. They are getting huge!