That is very interesting Kevin and so cool that your tank is so closely following their natural habitat!
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I don't have any pics or vids this time, but the tank is doing well. My basement doesn't have heat, and we're having a cold winter, so my water temperature has been just below 60F degrees for a while now. It was 58 yesterday. I think someone needs to shoot Punxatawny Phil and hire Punxatawny Bob to predict winters from now on. I haven't seen fish fry in a few weeks. My guess is that the 60 degree mark is about as low as any of these species will go to lay eggs. The male blennies are loosely guarding their shells, and some have changed their favorite shell. The gobies hang out in any shell that the other fish don't chase them out of, and are not defending any of the shells except against each other. The large male skilletfish still hangs out in his shell, defending it all the time, but is not guarding eggs now, and probably hasn't been guarding them for a while now. I have not seen any eggs laid in several weeks now. It could also be that the fry won't hatch below 60 degrees, so why would these fish waste all that energy? Instead, they're all getting nice and fat. We've seen such nature in other fish species, females fat with eggs in late winter and spawn when the temperature is right. This is especially true with walleye, musky, bass, and yellow perch this time of year.
Anyway, I'm guessing the spawning routines will once again go full swing when my basement temps heat up in spring, just like in the wild. After all, when planning this tank, I was hoping this type of cycle would happen. Now, it's a bit disappointing to not see fry swimming around...kinda selfish of me, right? But, it's more like nature, I think.