There are some organisms that make there own food and that don't need vitamins from the sun.
The Hydrothermal Vent Crab lives in the Sunlight Zone.
Hydrothermal vents are commonly found near volcanically active places, areas where tectonic plates are moving apart, ocean basins, and hotspots. Vent organisms depend on chemosynthetic bacteria for food. The water from the hydrothermal vent is rich in dissolved minerals and supports a large population of chemoautotrophic bacteria.
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chemoautotrophssulfur
Chemosynthesis is important to hydrothermal vent organisms because it allows them to produce energy from chemicals in the absence of sunlight. This process serves as the foundation of the food web at hydrothermal vents, providing vital nutrients and energy for the entire ecosystem. Organisms such as tubeworms, mussels, and shrimp rely on chemosynthesis for survival in these extreme environments.
Chemosynthetic bacteria and archaea form the base of the food chain.Round a hydro thermal vent, the source of energy is chemical (from Hydrogen Sulfide) rather than light. Specialised singe celled organisms from the bacteria and archaea (called chemotrophs) use the chemical energy to grow and then various more normal animals eat the bacteria.
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They are an undersea thermal vent or hydrothermal vent.
Black and white smokers are submerged by hydrothermal vents at mid-ocean ridges, which are formed by volcanic activity along tectonic plate boundaries. These hydrothermal vents release hot, mineral-rich water into the deep ocean, creating unique ecosystems where extremophile organisms thrive.
Yellowstone National Park
Some archaebacteria, such as thermophiles, live by hydrothermal vents. They are chemoautotrophs, which means that they produce their own food using energy from the chemicals in the vents instead of using energy from the sun. The energy starts in the vent, then goes to the archaebacteria, then to the organisms that eat those archaebacteria, and so on.