Bettas will often color up as they hit their prime, and then slowly fade back a little lighter in old age. Good food and housing also helps to bring out color in fish. :) I’d say he’s perfectly healthy.
If the color change is really drastic it’s possible he carries the marble gene. Here’s a neat little article on that for you.
Sorry for the belated response! You would be really surprised what fish can fit through as far as jumping goes. I keep some african ropefish and they’re absolute escape artists, I have to cover all of the itty bitty holes in my tank or they’ll be slithering across my floor.
Oh dear! Glad she’s okay, though. Usually covering any holes will solve the problem permanently, you can use some heavy card stock or a piece of cardboard and some strong tape to do a solid job. I have a crayfish that would climb up his heater and out the hole at the top, and since sealing it that way he hasn’t been roaming around my kitchen floor. :)
More to think about!
A photo would certainly help a lot in this situation so I would see what he looked like… does he still eat and behave normally, or is he lethargic? Is it where his stomach is on his body? Fuzzy, or just a plain white bump?
That sounds awful, I have dreams that I forgot to take the siphon out of the tank and all of the water is gone.
They can, but they don’t have the beard beneath their gills like a male does. I had a female for a short period of time that would puff out her gills and get all antsy like a male would, but just had no beard.
I think it’s awful for anyone to give a living animal away in that manner, because it sets people up to be stuck with animals they can’t properly care for. I see it a lot with people giving goldfish away, it’s awful.
As for your baby, as long as you keep his bowl clean he should be just fine. In regards to your second ask, keep up with the changes and they’ll be fine until you can get a better tank. :)