I have to say I have experienced some interesting things in my fish tank this year.
I recently (December 29) bought three wrasses from Captain Nemos, 2 exquisite wrasses, 1 6-line.
The 6-line made 2 separate trips down to the basement via the overflows and I had to scoop him out of the overflow 2 other times. Then he disappeared. Haven't seen him in over a week.
That brings me to the 2 exquisite wrasses. They are beautiful hot pink fish. One was nice and big and active and out a lot. The other disappeared for a few days but has since shown up for feedings. He is much smaller and I was worried about him. well, I arrived home from work tonight to find this: