I am asking this question hoping beyond hope that the answer provided by someone will help to relieve my fears that I have completely lost it.
About a month ago I added my first batch of fish to my tank: 8 zebra danios and 3 cory cats. Talking about that was my first-ever post here on AA, in fact.
That first night, one of the zebras died. I fished him out of the tank the next morning. About a week later, one of them died. Again, fish was removed from the tank.
Now, last time I checked, 8-2=6. Someone please correct me if I'm wrong.
So over the 3 weeks or so, I have been observing my tank lots. I mean, LOTS, because I had been dealing with some sick dwarf neon rainbowfish. Also a good friend who lives across the hall is in here all the time, so he watches as well. Both of us agree that there were definitely 6 zebra danios.
Well, about 3 or 4 days ago, he says to me, "John Paul, how many zebras are there? I swear I can count seven." After making fun of his math skills, I look at the water...sure enough, there are 7. Absolutely, positively 7.
Now here's the kicker--one of them is less than half the size of all the others. They were all roughly the same size when I got them at the lfs
(maybe 3/4" or so). Most of mine are now twice that size...roughly 1.5." Except for one, who is no more than 3/4", probably closer to 1/2."
Is there any chance this guy was hatched in my tank? Could an egg hatch and grow to more than 1/2" in a month? (And do so without me ever seeing him swimming around the tank?)
Or am I going completely crazy...