Something Fishy

My friend, Agnes, is staying with me for a few weeks until the new room she will be renting becomes available.
She has gone to stay with her sister for a few days (to have a lie in no doubt as I am an early riser and she is not a morning person.)
She has left me in charge of her fish, Alexander, for the week.
Don't think he has noticed she's gone yet, he seems quite happy just as long as someone is feeding him.