Thalassa Xenowyrm

Thalassa Xenowyrms were released on June 27, 2015, alongside Astrapi, Chrono, Gaia, Mageia and Pyro Xenowyrms.

This release was the first to introduce wyrms into Dragon Cave.

Egg
"Mana courses throughout this glassy egg."

Hatchling
"Aww... It’s a cute baby dragon. But... where are its legs?"

Mature hatchling
"Aww... It’s a cute baby dragon. But... where are its legs? And look! It has gotten bigger and is now able to use magic. It must be close to maturing."

Adult
"Originating from a single species that thrived in ancient times, Xenowyrms have become an incredibly diverse breed whose appearances vary depending on their habitats. Each Xenowyrm subspecies is heavily reliant on the power of a different type of mana, making them powerful magic users. Thalassas are a unique variety of Xenowyrm in that they are the only subspecies known to dwell in marine environments. Their porous skin and slender build are perfectly suited for the aquatic terrain, but they can only survive for short periods of time on land. Powerful users of water magic, they can create large waves and alter currents with a simple thought."

Sprite artists

 * Birdzgoboom (All)

Sprites
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Breeding
Breeding patterns have been confirmed by Birdzgoboom, being based on biomes, and are as follows:

Situation 1: Xeno x Non-Xeno (regular biome):

Outcome 1: the Xeno breeds its same variation

Outcome 2: you get an egg from the Non-Xeno breed

Outcome 3: you get the Xeno corresponding to the Non-Xeno's biome

Situation 2: Xeno x Non-Xeno (Cave):

Outcome 1: the Xeno breeds its same variation

Outcome 2: you get an egg from the Non-Xeno breed

Outcome 3: you get a random egg from the other 5 Xeno variations

Situation 3: Xeno x Xeno:

Outcome 1: They have a chance to breed the Xeno variation from parent A

Outcome 2: They have a chance to breed the Xeno variation from parent B

Outcome 3: They have a smaller chance to breed one of the other 4 (or 5 if both parents are the same variation) Xeno variations.

Trivia

 * During the breed's release, the initial mature hatchling description displayed a glitch: the standard mature hatchling message ("And look! It has grown wings") was displayed as well as the custom one meant for this particular breed. This has since been removed.
 * Under the old Breed sort, these dragons sorted as "Xenowyrm 1" ("1" indicative of the Coast habitat). As of August 14, 2016, they now sort using their Encyclopedia name of "Xenowyrm (Thalassa)".

Additional information
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 * Birdzgoboom did Q&A replies on the forum's release thread after the adults were revealed, with the following information to offer: