1.

Any outgrowth from the head of an animal

HORN

2.

A large group of fish

SCHOOL

3.

A group of cattle or sheep or other domestic mammals all of the same kind that are herded by humans

FLOCK

4.

The young of certain carnivorous mammals such as the bear or wolf or lion

CUB

5.

Fit and docile for domestic life and service to humans

TAME

6.

Organ of locomotion and balance in fishes and some other aquatic animals

FIN