Prince Fathom was a SeaWing who lived over 2,000 years before the main events of the first arc. He was the second known SeaWing animus dragon, and part of the royal family as Manta's son. After surviving the Royal SeaWing Massacre, Fathom was forbidden to use his magic and was shunned by the SeaWing tribe, as his sister, Queen Pearl, feared that Fathom would become like Albatross if he used his magic too much.
However, after one year of isolation, Fathom was summoned to the Night Kingdom, where his task was to befriend the NightWing animus Darkstalker and somehow convince him to stop using his magic. He was allowed three companions to act as guards during his time there: Indigo, Wharf, and Lionfish.
Fathom and Darkstalker did become great friends, but soon Darkstalker grew too powerful to control, brutally killing his own father with his magic and intending to kill Vigilance to become king himself. Along with freeing Indigo from a little wooden statue enchanted by Darkstalker, enchanting the bracelet was the only time that Fathom had used his magic since his vow. After giving the bracelet to Clearsight, Fathom and Indigo fled the kingdom together to raise three dragonets on an island far away from the Sea Kingdom.
Fathom was described to have rich, sea-green or emerald-green scales and grey-green eyes, which were said to look like miniature oceans after a storm. His forehead is usually creased with worry, born from fear of becoming evil or insane and mad like his grandfather. He also has a similar appearance to Turtle, another royal SeaWing.
Fathom was at first very happy that he had animus powers, and was hopeful that he would use them to help his tribe. However, after the Royal SeaWing Massacre, which resulted in the death of his parents and several other family members, he became depressed and lonely. He often felt he was a horrible dragon because of his powers and was terribly afraid of going mad like Albatross, resulting in him being wary of his powers. He loved the SeaWing Indigo, enough to make him use his powers to save her multiple times, and later his three dragonets.
Fathom was the grandson of Albatross and the second known animus of the SeaWings, the first known being his notorious grandfather. After Albatross went insane, Fathom swore an oath to his sister Pearl, who became the new queen of the SeaWings, to never use his animus powers again. A few years later, he was sent to mentor Darkstalker (and warn him of his soul), and the two became quick friends. On Clearsight's fifth birthday, Darkstalker made three enchanted star-shaped sapphires called dreamvisitors, and gave one to Fathom, and one to his soulmate, Clearsight, to link the three, no matter how far apart they were. As time passed, and the NightWing animus became more ambitious with his powers and enchantments, Fathom came to believe that Darkstalker would become evil, lose his mind, and kill everyone, so he broke his oath and enchanted Clearsight's bracelet to put Darkstalker into an eternal slumber. He and Clearsight were convinced that Darkstalker would turn evil and become a threat to everyone. The NightWings then moved to another island and gave up their powers to hide from Darkstalker and never allow anything that powerful to ever happen again. Until two thousand years later.
In Moon Rising, Moonwatcher read a scroll trying to find out about dreamvisitors and finds out about Fathom from the scroll and more about Darkstalker. The scroll mentions Fathom's ties to the Royal SeaWing Massacre, and his enchanted object to put Darkstalker to sleep, but not much else is mentioned. Darkstalker confirms that the enchanted object was a bracelet.
Fathom and a group of SeaWing dragonets; including his sister, Pearl and a dragonet named Indigo, are waiting on a beach on orders of Queen Lagoon. Indigo teases Fathom consistently, but he ignores her and follows Lagoon's orders to stay still. Finally, she arrives alongside Albatross. The two announce that they are going to be testing to see if any of the dragonets are an animus. Albatross gives them some coconuts and tells them to enchant the coconuts to hit him. At first, he tries politely telling the coconut to hit Albatross. When nothing happens, Indigo teases him again and he sternly commands it to do so, enchanting the coconut to hit Albatross for real. Albatross congratulates him while silently strangling a distant seagull with a vine.
Later, Fathom, Indigo and some other SeaWing dragonets are in a geography class when a messenger comes and tells him that Albatross is waiting for him due to their first animus session. Fathom meets his grandfather at the "sunset beach", and Albatross then leads him to the soon to be Summer Palace. He tells him the story of what happened with his sister, Sapphire, when they were young, and cautions him about the dangers of being an animus. Once they find out Indigo was listening to the story the whole time, Albatross changes his mind and they head back to the palace. Fathom then enchants a wooden pet octopus for Indigo that she names Blob.
Two SkyWings arrive in the palace, and Queen Lagoon reveals that she has animus dragons. Fathom spots Albatross waiting, but he slices her throat open and the Queen dies. Then soon enough, Albatross is on a rampage and killing all of the Royal SeaWing family. Pearl fakes her death so that she would not get killed and Fathom and Indigo escaped during the rampage. Albatross was looking for Fathom and Indigo and found them but Indigo attacked Albatross and fathom killed him with enchanted spears. After the massacre, Pearl became Queen of the SeaWings and Fathom swore an oath to her that he would never use his powers again.
After Current returns to the SeaWings, Queen Pearl calls him to her throne room. Many guards are stationed there, to give the illusion that the Queen is protected, because most SeaWings now fear animus magic due to the massacre. Fathom notices Indigo is there and feels a lot of longing to be with her. Current is there too, and he appears very frightened of Fathom. Pearl tells her brother that Queen Vigilance of the NightWings wants him to come to their kingdom to teach the animus Darkstalker not to use his magic, which he agrees to. Indigo asks if she can accompany him as a guard and after the other SeaWings support this, Pearl lets her.
Darkstalker mentions his hate for Fathom while in the old Night Kingdom and says he will never forgive him. He gives Anemone Fathom's room in the old palace and tells her it used to be Fathom's. Darkstalker said that because of Fathom, he doesn't accept gifts from animus dragons, "especially lying, conniving SeaWings". Later, when he sees Turtle for the first time, he roars "Fathom!" and shoots fire at him, and later tells Turtle he looks exactly like Fathom.
Qibli mentions Fathom and Clearsight when he asks himself if he and Clearsight like some kind of backup plan if their friend/enemy is freed, and that he would if he were them.
In the prologue, Clearsight thinks briefly about she saved Fathom and the NightWings, and could now settle down for a more peaceful life in Pantala.
"I mean… there are dragons that do bad things. But maybe that doesn't make them all bad. Maybe they can also do good things. Maybe some of those bad things are just mistakes." - Fathom describing "bad guys" (Darkstalker) to Ripple.
"Spears! Kill my grandfather!" - Fathom's enchantment that killed Albatross
"Do you think it's true that animus dragons lose their souls? Is that why he's doing this?" - To Indigo during the Royal SeaWing Massacre
"Clearsight just flew off with the bracelet and he's meeting her and hopefully she can use it on him, but it's possible she won't be able to, and then he'll be really mad, and then he might come back and... you know, destroy the world after all." - Fathom to Indigo, updating her on recent events after freeing her from the carving
"I seem to recall just a few shrieking fits when you were that age." -Fathom to Indigo, about when they were young
"Sometimes ... sometimes they don't know they're bad guys. They think what they're doing is the right thing." -Fathom to his and Indigo's dragonets.
"Um, like, never eat the purple variety of long-legged sea crab?" -To Darkstalker, when told to "Say something wise and insightful now and then."
"Queen Pearl of the SeaWings, I pledge you this oath, on my life and sealed with my blood: I will never use my animus magic again, not for the rest of my days." -Fathom's oath to his sister
- A fathom is a unit used to measure water depth, which is equal to six feet. Fathom also means to deeply think.
- Because of Albatross being part IceWing, Fathom is of IceWing descent.
- One of Fathom's descendants, Prince Turtle, is said by Darkstalker to look exactly like him. During the party at which the SeaWing massacre occurs, he also wears golden armbands, similar to Turtle's golden armband.
- He appeared in Clearsight's visions before she met him.
- Fathom appeared as the protagonist of one of the 3 parts of Darkstalker (Legends).
- Since Fathom and his family lived on an island near the Rainforest Kingdom, he may have hidden Darkstalker's scroll on that island, or somewhere within the rainforest. If this is the case, it may explain how Chameleon found it, being the only known exiled RainWing.
- In Talons of Power, Darkstalker says that he still hasn't forgiven Fathom for "betraying" him.
- He is the third dragon shown to have artistic talent, the first being Mightyclaws and the second being Whiteout.
- In some of Clearsight's visions, he was the godfather of her and Darkstalker's dragonets.
- Darkstalker and Clearsight were the first people who trusted him after the massacre
- Darkstalker and Fathom might me distantly related as Darkstalker is half IceWing and fathom is of IceWing descent.
- ↑ Darkstalker (Legends), page 264
- ↑ Darkstalker (Legends), page 309
- ↑ Darkstalker (Legends), page 185
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