I think that goldfish make the best friends.
First, goldfish are beautiful and colourful. It is nice to watch the goldfish swim around. Second, goldfish are easy to keep. You just need a tand and some water. You cannot really do anything with a goldfish except watch it. Third, goldfish means luck and wealth. They can bring people joy and peace when we see them in the tank.
Foe these reasons, I believe that goldfish make best friend.