Ketos (海王ケトス Sea King Ketos, also called Oceanmaster Ketos) is the guardian of the Undersea Grotto in both Etrian Odyssey III and Etrian Odyssey Nexus.
Ketos (Etrian Odyssey III)[]
| Ketos | |
| |
| Description | |
|---|---|
| A grand white whale that slumbers in the abyss. It uses Telepathy to speak with explorers. | |
| Enemy Data | |
| HP | 4699 |
| ATK | 32 |
| DEF | 32 |
| EXP | 9905 |
| Skills | Great Melody Ocean Rave Spout Grand Berry Freeze Ripple |
| Items | Whale Fumarole Tough Membrane 
|
| Weakness | 
|
| Resistance | None |
| Status Resistance |         
|
This huge, ancient whale is a faithful servant of the king of the Deep City, and is capable of telepathy. Even so, he is treated with great respect, by both the king and his other servants. Although unwilling to fight the explorers, he does so, as it is his duty as the guardian of the city. After they defeat him, he shows respect toward the explorers, calling them "great ones", and allows them passage into the Deep City.
Skills[]
- Spout (Uses Head): Self buff, increases evasiveness.
- Freeze Ripple (Uses Legs): Deals moderate ice damage to the front row and attempts to inflict leg bind.
- Ocean Rave (Uses Head): Deals heavy Bash damage to party members with status effects or binds.
- Grand Berry (Uses Head): Heavy Bash damage to one party member and attempts to inflict Paralysis.
- Great Melody (Uses Head): Attempts to put the entire party to sleep.
Drops[]
- Whale Fumarole (Worth: 913 en)
- Used to create the Ocean Gun (Gun, 75 ATK, 4 forge slots)
- Tough Membrane (Worth: 10000 en)
- Condition: Defeat it in the first turn.
- Used to create the Calico Sailor (Light armor, 122 DEF, +1 AGI, +1 LUC, +3% crit rate), the best armor for Buccaneers.
Ketos (Etrian Odyssey Nexus)[]
| Ketos | |
| |
| Description | |
|---|---|
| A grand white whale that slumbers in the abyss. Its intellect far surpasses that of humankind. | |
| Enemy Data | |
| HP | 20456 |
| ATK | 70 |
| MAT | 72 |
| DEF | 45 |
| MDF | 48 |
| EXP | 54750 |
| Skills | Ocean Rave Freeze Ripple Great Melody |
| Items | Whale Fumarole Whirlpool Hide 
|
| Weakness | 
|
| Status Weakness | 
|
| Status Resistance |    
|
| Status Immune | 
|
Ketos is the boss found at the end of the Undersea Grotto. It guards the map that was hinted to in the documents the party had been recovering.
Skills[]
- Ocean Rave (uses Arms): Powerful but inaccurate melee bash attack to the entire party.
- Freeze Ripple (uses Legs): Ranged ice attack to 1 line, may bind legs.
- Great Melody (uses Head): May put the entire party to sleep.
- Grand Berry (uses Arms): Line-piercing bash attack, may paralyze.
- Spout (uses Head): Raises its own evasion for 3 turns.
- Ancient Roll (uses Legs): Raises Ketos's own accuracy and decreases the party's evasion for 3 turns.
Drops[]
- Whale Fumarole (Worth: 10000 en)
- Whirlpool Hide (Conditional) (Worth: 24600 en)
- Condition: Defeat Ketos while it is panicking.
- Unlocks the Great Mountain (240 ATK, 120 MAT, Ocean Rave skill), the strongest Drive Blade in the game.
Strategy[]
- See Ketos/Strategy for more information.
Trivia[]
- Ketos (sometimes latinized as Cetus) is a reference to a whale monster in greek mythology of the same name, often described as a gigantic whale or shark, who was fought and defeated by Perseus and Heracles. The term Cetacean is also derived from the latinized version of this word.
- Ketos is one of the few monsters in the entire series shown to be capable of human speech, albeit via telepathy. Other ones include Alraune and the Master Bird. Manticor is also said to be able to speak but is never shown doing so.
- However, Ketos does not speak at all in Etrian Odyssey Nexus, suggesting that it is not the same Ketos from EO3