Some exercise for your brain:

This is a famous problem, attributed to Albert Einstein.
There are 5 houses sitting next to each other, each with a different 
color, occupied by 5 guys, each from a different country, 
and with a favorite drink, cigarette, and pet.  Here are the facts:

The British occupies the red house.
The Swedish owns a dog.
The Danish drinks tea.
The green house is on the left of the white house.
The owner of the green house drinks coffee. 
The person who smokes "Pall Mall" owns a bird.
The owner of the yellow house smokes "Dunhill".
The owner of the middle house drinks milk.
The Norwegian occupies the 1st house.
The person who smokes "Blend" lives next door to the person who owns 
a cat.
The person who owns a horse live next door to the person who 
smokes "Dunhill".
The person who smokes "Blue Master" drinks beer.
The German smokes "Prince".
The Norwegian lives next door to the blue house.
The person who smokes "Blend" lives next door to the person who drinks 
water.

The question is: Who owns the fish?

Good luck!