moles
The early mole digs the deepest hole.
Because it lives manly under ground where it is so dark :)
Niche: an organism's role in the environment. Habitat: specifically where it lives. For example, many organisms maybe have the same habitat (under a log, if we're considering insects), but as long as they occupy different niches, they will not be in competition.
No.
Truffles grow under the ground.
The answer to your question is the Mole. The mole is blind, but has an remarkable smell.
There is one species of Cicada that lives under ground for 19 years but they are not sleeping, they feed of the root sap of the tree that they live under, when they do come above ground, they mate and then die.
Earthworms and bacteria.
mole
Yes
Under ground to catch its pray!
Fossils are under ground at random points in the day or night.
whales and dolphins
A vampire squid.
Nothing
An animal such as rats.
The hippo is born under water and lives on the Savannah.