There are many strange creatures living in the depths of the ocean. Hydrothermal vents are openings in the Earths crust at the bottom of the ocean that emit toxic, scalding hot chemicals like hydrogen sulfide. The animals living in the vents are in symbiotic (mutually beneficial) relationships with the bacteria that turn the hydrogen sulfide into nutrients. Some of the animals that live in these habitats include large clams, mussels, snails, and an array of polychaete worms.
Seasons: Spring, Summer, Fall, Winter
(Source: Black Smokers. Environmental Literacy Council. Accessed online February 7, 2008. http://www.enviroliteracy.org/article.php/526.html.)