Coral exists in many forms, many textures and many colors. Coral is not a plant but an animal, rather a set of animals in fact. Coral is indeed a set of polyps (same family as jellyfish) ;).
Parrotfish create a protective envelope around them when they are sleeping.
So, don't put the light on them during night dive to don't to wake them up and break this envelope.
Mammals have a horizontal tail.
Fishes have a vertical fin.
The kakihona sushi (sushi wrapped in persimmon leaves) are really the best!
To eat them, you have to go to Nara!