I think you are right! They do seem to know times for different things. Speaking of knowing feeding time, my husband never messes with the fish but tonight while I was feeding one aquarium, my husband was standing looking at Buddy, (my Betta). I told my husband to give him a couple of pellets. Well, my Betta was so excited when my husband opened the lid to feed him, he jumped almost out of the aquarium at my husband!
First time he has ever done something like that. I think it was because my husband stood there for quite awhile just watching him before he opened the lid. Guess he was a little impatient for his food.
I just hate the humid weather.
We get our share of that here in the summer. The last few summers have been terrible hot and humid.