Ghast

Ghasts are large hostile mobs that will be added in Update 0.11.0. They are 4*4*4* blocks in size and have 9 tentacles. They will only be able to spawn through spawn eggs in creative mode.

Spawn
Ghasts can only spawn through Spawn Eggs as of Update 0.11.0

Behavior
Ghasts fly around in the sky, crying at regular intervals. They give out a loud shriek when killed.

Combat
Ghast attack by shooting exploding fireballs, these fireballs however, can be deflected by a sword, a pick-axe, or by hand.

Trivia

 * Ghasts currently do not have implemented sounds yet.
 * Ghast's attacks looks like a Fire charge but with a fire animation.
 * It is possible to kill it by deflecting it's fireball.
 * Ghasts do not drop Ghast Tears as of yet, due to the devs not implementing them to MCPE yet.
 * Ghasts are the only mob that are hostile in creative with provoking.