What is an important characteristic of an index fossil?

a. it must have been very small.
b. it must not be extinct.
c. it must have lived in a very wide geographic region.
d. it must have lived for a long geologic period of time.

decrease

Explanation:

The egg eating predators are species like birds, frogs, fishes, snakes and other aquatic animals that feed on the eggs release by the females for spawning.

Fishes use spawning behavior to reproduce. It is a process of releasing the eggs and sperms in to the water for reproduction by the fish.

But other species called as the egg eating predators feeds on these eggs and therefore only some of the eggs are able to reproduce and others cannot.

Thus the presence of egg eating predators in the water would reduce the probability of the fish to reproduce successfully.