My betta, Phoenix, is usually really active and happy whenever I am there, but recently he's been very down. He will pop up to the surface for some air every once in a while but other than that he sinks himself to the bottom of the tank and sometimes hides behind his little tiki guy. Today he wouldn't really eat at all and is moving slower than usual.
I have a feeling he is feeling lonely or depressed, but I'm not sure.... Any ideas as to what it is thats making him be like this, and what can I do to help??
It also has crossed my mind that he may be much older than I expect and that he could just know that his time is coming...any thoughts about this, too?