Emperor Angelfish have deep, flat, bodies and small mouths. They are
striking to look at, being large (40 cm)and colourful.
The flattened shape of angelfish enable them to wind their way amongst the
corals; it also enables them to retain their stability when manoeuvring at
low speed to pick up items of food, in the same way that a keel of a
sailing boat helps with its steering and prevents
it from turning over.
You see the Emperor Angelfish in warm seas around the world, including the
Red Sea, East Africa, Hawaii, Japan and Australia. The young
angelfish looks totally different to the adult, having concentric white
rings on a dark blue background. You will find the juveniles
under ledges or in holes of shallow reef flats. Adults go deeper, from 3 -
Adult males typically defend a large territory containing 2 females.
However, you will ususally see the fish in pairs. The fish are
protogynous. This means that they are born as females and develop
into males later.
Coral Reef Fishes, Indo-Pacific and Caribbean
by Lieske, E. and R. Myer
The Red Sea in Egypt Part I Fishes
by Farid S. Atiya, ISBN 977-00-0443-X