General terms:
* Extremophiles: This term is used for organisms that thrive in extreme environments, such as very high or low temperatures, pressures, salinity, or acidity.
* Deep-sea organisms: This term is used for any organism that lives in the deep sea, which is generally considered to be below 200 meters.
* BENTHIC organisms: This term refers to organisms that live on or in the bottom sediments of a body of water.
Specific terms:
* Hydrothermal vent organisms: These organisms live near hydrothermal vents, which are hot springs on the ocean floor.
* Cold seep organisms: These organisms live near cold seeps, which are areas where methane and other hydrocarbons seep out of the seafloor.
* Hadal zone organisms: This term refers to organisms that live in the hadal zone, which is the deepest part of the ocean, below 6,000 meters.
It's important to remember that:
* There is no clear definition of what constitutes an "alien" organism.
* The term "odd" is subjective and can vary depending on the individual's perspective.
* Scientists are constantly discovering new and fascinating organisms in these environments, and the terms used to describe them are constantly evolving.
In summary: While there isn't a specific term for "aliens and odd organisms" that live at the bottom of the ocean, scientists use a variety of terms to describe the diverse range of organisms that live in these extreme environments.