Mud Dragon

Mud Dragon
You can obtain the Mud Dragon by breeding an Terra Dragon and a Sea Dragon at the Breeding Mountain or Ultra Breeding Tree. This may also result in a Waterfall Dragon

Automated Names
Automated names are the names that the game automatically gives after your dragon has hatched. You can change these names to whater you would like automatically. However, whatever you change dragon's name to is not considered an automated name, unless it was automated. Automated names, however, can only be a maximum of 9 characters in length. If the automated name of your dragon is not listed below, freely add it anytime:
 * Dino
 * Sanderson
 * Chuckles
 * Skipper
 * Alphonsine
 * Wilbur
 * Ben
 * Splashy
 * Izzy

Trivia
Along with the Poo Dragon, the Mud Dragon is listed as the weakest dragon on the power table

It is the Ugliest Dragon,like its cousin,the Poo Dragon