all seas have organisms living in them, even lakes, and any body of water, really.
put it this way, we are organisms, fish are organisms
A loggerhead turtle is an organism that lives in the neritic portion of the ocean
A dolphin
A producer in the ocean is seaweed. Shrimp is a producer as well as a consumer.
habitat
Habitat
cone snail
parasite is the organism that lives on other organism without any benefit to the host.
The environment in which an organism lives is its habitat.
An organisms habitat is where the organism lives; ex ocean, forest, desert etc. The organisms niche is its role within the habitat.
An organism that lives on or in a host and harms it is usually called a parasite. When the relationship mutually beneficial instead of harmful, it is called a symbiote.
A living place where an organism lives is called a habitat.
The Ocean Phantom is not a real organism. It is the postulated name for a future organism in the 2003 Animal Planet/ORF and ZDF series "The Future Is Wild." The Ocean Phantom is said to be a future species of giant sea creature descended from the present Portuguese Man o' War (Physalia physalis).