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I promised to tell you everything you need to know. The thing is, however, you don’t really need to know anything. You see, even if you made it to Rome, which is quite unlikely, you’d never defeat my giant brothers without a god fighting at your side. And what god would help you? So I have a better plan. You’re not leaving. You’re VIPs—Very Important Prisoners!

–Phorcys to Frank Zhang and Percy Jackson, in The Mark of Athena

Phorcys (or Phorkys), is a god of the hidden dangers of the deep. He is most notable in myths for fathering a host of monstrous children collectively known as the Phorcydes.


Phorcys is the son of Pontus and Gaea. He is most notable for bearing by his sister-wife Keto, a sea goddess: the Gorgon sisters Medusa, Euryale, and Stheno, Phorcydes the Graeae (Graiai) (known as the Gray Sisters), Echidna, and Skolopendra. His children have been faced by many heroes in ancient texts.

In the Series

Keto and Phrocys joined Kronos to fight against the gods in the Second Titan War. However, once Kronos was defeated and his army fell, the two were banished to Atlanta, a landlocked city in Georgia. They made the best of it and opened up an exhibit in the Georgia Aquarium.

The Heroes of Olympus

The Mark of Athena

Percy Jackson, Frank Zhang, and Gleeson Hedge meet Phorcys and his sister Keto at the Georgia Aquarium in Atlanta. The god lets Percy, Frank, and Gleeson Hedge in for three denari, and gives them a VIP tour. Phorcys shows them the rare monsters the aquarium has in captivity. Keto soon takes Coach Hedge to a different area to show him more dangerous monsters. Then, Phorcys traps Frank and Percy in a tank, with a plan to make them fight everyday for the entertainment of the visitors. Percy tries to control the water, but fails because he was in Phorcys' territory. Percy and Frank, who had turned into a koi fish, try to get Hedge's attention when the latter walks by with Keto. Frank, Percy, and Hedge then break the glass tank and escape with Percy promising to return, and free the monsters and sea creatures in captivity.


Phorcys was very robust and had the tendency to act on the more flashy side of things. Instead of relying on information to entertain tour groups, he used fireworks.

Phorcys was playful, joking around with Percy and Frank before finally trapping them. He felt that too much information would bore guests, which led to him constantly getting angry at Keto. Much like Keto, Phorcys had no problems mistreating sea creatures except if it prevented them from performing tricks.


Phorcys had many features similar to a crab. He had a hunched back and kept his arms in the air as if holding plates, tending to scuttle around sideways on his bowed legs. In The Mark of Athena, Phorcys wore a wet suit that appeared to be several shades of green. There were glittery silver words printed on the side: PORKY'S FOLLIES. In his greasy wiry hair, he wore a microphone headset. His eyes were milky blue with one higher than the other. When he smiled, his smile looked like it was being peeled back.


  • Hydrokinesis: As a sea god, Phorcys has a high level of control over sea water, though inferior to that of Oceanus and Poseidon. He used his ability to aid in his control of the aquarium and all the creatures kept there. He was able to overpower Percy, but only as long as he was in the latter's immediate area.
The Heroes of Olympus
Core Series: The Lost Hero | The Son of Neptune | The Mark of Athena | The House of Hades | The Blood of Olympus
Main Characters: Jason Grace | Piper McLean | Leo Valdez | Percy Jackson | Frank Zhang | Hazel Levesque | Annabeth Chase | Iapetus/Bob | Reyna Ramírez-Arellano | Nico di Angelo | Gleeson Hedge
Secondary Characters: Hylla Ramírez-Arellano | Dakota | Tyson | Ella | Octavian | Halcyon Green | Dr. Howard Claymore | Alabaster C. Torrington | Lamia
Minor Characters: Rachel Elizabeth Dare | Grover Underwood | Thalia Grace | Clarisse La Rue | Fleecy | Mrs. O'Leary | Kinzie | Arion | Calypso | Lou Ellen Blackstone | Chiron | Will Solace | Tristan McLean | Don | Julia | Jacob | Michael Varus | Burly Black | Medea | Midas | Lityerses | Phineas | Otrera | Echo | Narcissus | Sciron | Pasiphaë
Olympian Gods: Zeus | Hera | Poseidon | Hades | Ares | Demeter | Athena | Apollo | Artemis | Hephaestus | Aphrodite | Hermes | Dionysus
Minor Gods: Achelous | Aeolus | Asclepius | Boreas | Eurus | Hecate | Iris | Hypnos | Keto | Khione | Kymopoleia | Mithras | Nemesis | Nike | Notus | Phorcys | Serapis | Thanatos | Triptolemus | Zephyros
Roman Gods: Jupiter | Juno | Neptune | Pluto | Mars | Minerva | Ceres | Lupa | Bellona | Fortuna | Janus | Terminus | Vulcan | Mercury | Apollo (Roman) | Diana | Venus | Bacchus | Pomona | Aquilon | Hercules | Cupid | Auster | Favonius | Letus | Victoria
Giants: Enceladus | Porphyrion | Alcyoneus | Polybotes | Ephialtes | Otis | Damasen | Clytius | Mimas | Orion | Hippolytos | Thoon | Periboia
Undead: Gray | Zombie
Primordial Gods: Gaea | Tartarus | Ourae | Nyx | Chaos | Ouranos | Akhlys | Hemera | Elpis | Spes
Monsters and Magical Creatures: Cynocephali | Gorgon | Gryphon | Harpy | Basilisk | Lycanthrope | Gegeines | Cyclops | Katobleps | Unicorn | Giant Eagle | Ichthyocentaur | Satyr/Faun | Storm Spirit | Laistrygonian Giant | Lares
Related Content: Rick Riordan | Haley Riordan | Percy Jackson and the Olympians | Percy Jackson and the Olympians: The Ultimate Guide | The Demigod Files | The Demigod Diaries | The Son of Sobek | The Singer of Apollo | The Staff of Serapis | Percy Jackson's Greek Gods | Percy Jackson's Greek Heroes | The Crown of Ptolemy | Demigods & Magicians | Demigods of Olympus | Percy Jackson Demigod Collection