Ghost fish

Sometimes I have a terrible feeling
that there is a fish
somewhere
I forgot to feed,
in a dim room, 
dust gathering on the surface,
looking like a ghost.
I can see right through him
to the other side of the glass
and that makes me very scared
because I swear I fed him
yesterday
watching him float to the surface
and eat the three little pieces
I dropped in for him.
People say that dogs are the smartest animal
but they are wrong
because when I turn to leave
the fish is watching me
and I want to cry out:
I remembered!
I really did this time!
But he says in a quiet stream of bubbles,
You forgot
you almost didn't this time.
I want to run out of the dim room
away from the fish's stare 
that feels like ants all over me
but 
I will come back in a few tomorrows
and cry a little to myself as the 
fish floats up with his awful eyes.
The scariest thing
is when the ghosts won't die.