Where's Chella?

we've been slowly adding new fish to the tank (as a couple of the original fish died).  the first was a Chinese Algae Eater which mimi decided to name Chella (pronounced /Keh lah/) and then a few weeks later a blue Siamese Fighting Fish which she named Sky.  chella is the most fun though.  as is typical of this type of fish, she prefers to find little caves to hide.  the kids like to check the tank every day for a game of Where's Chella?  and the days when she decides to reveal herself brings on a great deal of excitement.  who wudda thunk.