Dark Ocean Depths

• In 2003, a predatory jellyfish species was discovered in the dark, cold environment of the Monterey Submarine Canyon at a depth of 2,100 feet. The species was named granrojo, meaning "big red."
  
  

Indo-Pacific Ocean

• Deadly box jellyfish inhabit the warm Indo-Pacific Ocean, particularly in both near-shore waters and the open ocean off Northern Australia, according to National Geographic.
  
  

Moon Jellyfish Environment

• Brackish waters with low salt content are a desired environment for some species such as Moon jellyfish. Moon jellyfish are also very common in the Mediterranean Sea.
  
  

Eelgrass Provides Habitat

• A large variety of jellyfish such as the bell jellyfish inhabit the shallow seafloor swimming amid the eelgrass beds. Stalked jellyfish attach themselves to rocks in the same environment.
  
  

Tropical Waters

• The Portuguese man-of-war, also known as the bluebottle jellyfish, prefers tropical and subtropical regions of the Pacific and Indian Oceans, and the northern Atlantic Gulf Stream. This species frequents the coastal waters of Hawaii.