What food chain doesn't rely on the sun?

Question

What food chain doesn't rely on the sun?

Answer 1

Chemilithotrophic bacteria (obtain energy by breaking inorganic chemical bonds) exist in deep ocean vents, but they also exist much closer to you and I in the soil! The Thiobacillus genera of bacteria obtain energy in this way and are found in all of the worlds soils...

Answer 2

the one at the deepest depths of the ocean where sunlight cannot reach. the one at the volcanic trenches.

Answer 3

There are some deep sea bacteria that thrive around geothermal vents on the ocean floor.  It is one of the only living organisms to be the start of a food chain that do not rely on the sun.