* Chemosynthetic bacteria: These bacteria use chemicals like hydrogen sulfide, methane, or iron to create energy through a process called chemosynthesis. They often live in extreme environments like hydrothermal vents or deep-sea ecosystems where sunlight can't reach.

* Deep-sea organisms: Some organisms living in the deep ocean rely on food sources that ultimately come from chemosynthetic bacteria or the slow rain of organic matter from the surface.

* Cave-dwelling organisms: Some organisms living in caves don't have access to sunlight and instead rely on food sources like bat guano or other organic matter that falls into the cave.

It's important to note that even though these organisms don't directly rely on sunlight for energy, they are part of an ecosystem that ultimately depends on the sun for its energy source.