Salt water that is flowing so the corals can collect passing nutrients. It also needs a solid base to get started. Then it grows on the skeleton of the coral that came before it
Coral, seeweed
Generally speaking, live coral.
Microscopic Algae live in coral reefs
octopuses live in the coral reef
The Graet Barrier Reef aka (GBR)
warm water
bird
Some fish eat of the coral reefs, but they do not live on or in the coral reefs. But every fish living on or in the coral reef has a job to do that protects it from the intrudors.
Coral animals live in coral in the ocean.
Zooxanthellae are a type of dinoflagellate that live in the "skin" of hard coral. It's a symbiotic relationship where the zooxanthellae are photosynthetic and produce nutrients for the host coral.
Clownfish live at the bottom of the sea, usually in a coral reef environment
because it has some type of gilsl