What part of an ocean would you found the most sea life?

The part of the ocean with the most sea life is called the coral reef. Coral reefs are underwater ecosystems characterized by rich biodiversity, with a variety of marine life such as corals, fish, mollusks, and crustaceans. They occur in warm, shallow waters, primarily in tropical and subtropical regions. Coral reefs are often referred to as the "rainforests of the sea" due to their high levels of biodiversity and ecological importance.