Right after I turned the light, out the corner of my eye, I saw a flash of movement. A tiny speck was hanging on to the back wall of the tank.
Looking closer I saw it move. It was a very, very tiny crayfish. At least one of the babies has hatched.
I fed the fish then watched as this tiny crayfish tried to blend in with the rocks and other decorations. I guess it was less than 5mm long. Very, very hard to see. I’m curious what happened to the rest of the eggs in the sac. After seeing one crayfish with some eggs, I later saw a second carrying eggs and making a bit of a nest under the rocks.
Curiosity is strong though. I want to move the tank decor to see what is going on underneath, but I also don’t want to disturb them tiny creatures. When they are ready they will make their way out. I’ll have to be careful next time I clean the tank though.