Dream About Grotesque Fish Attack

I had a fish tank with fish in then all of a sudden I saw a fish egg. When the fish hatched it was different from all the other fish in my tank, it was strangely large for its age and was quite grotesque in looks. All of a sudden it started to attack and eat one of the beautiful fish in the tank. So I quickly snatched it out of the tank, in fear that it would strike again and threw it onto the hard wooden living room floor. When I looked it had grown even larger which was quite disturbing and was still alive. When I told my dad he grabbed a heavy glass and killed it.