The answer is: a pack ! Isn't that easy?
I do not know. Why can't you answer it. That's my answer.
galaxy
A herd.
A group of nine is called an ennead.
A group of galaxies is called a cluster.
a group of unicorns is called a unicircle or unicluster
Sheep is always Sheep whether Plural or Singular
A forest, a grove, a wood, a copse, a stand of timber or even a jungle
penguines
penguines
a litter
The Chillaxes