Ender Dragon Worm

that is cool

Omg ! xD
I think it's a little Graphic Bug,
So I think if you reload you'r map the EnderDragon become normal

Is this still an issue in 15w44b? If so, please force a crash by holding F3+C for 10 seconds and attach the resulting crash report here.

Ticket resolved as incomplete, because no answer in a reasonable amount of time (1+ year), if it still happens, please update the ticket.