Afriend of yours tells you that they saw a tv special about a small fish with a large, gaping mouth with teeth that pointed backwards. you can rightly conclude that the fish your friend is talking about is:

It can rightly conclude that the fish the friend is talking about is mesopelagic.

Explanation:

Mesopelagic is not a particular species of fish, but it is a zone in the vertical zonal bifurcation of the oceans. The species of fish that prefer to stay in this zone are known as the mesopelagic fish. These species of fish exhibit unique physical attributes that are limited to only the fish living in the same zone.

The ceremonial column.