Undersea Grotto

The silent unknown abyss
Torrents of suspicion
Truth that pierces clouds
The proud, tall waves

—Floor descriptions, Undersea Grotto

Undersea Grotto is the second stratum in Etrian Odyssey III: The Drowned City. This strange maze appears as though it is located under the ocean, yet seemingly allows breathable air for explorers to venture. Many species of starfish, walruses, and coral inhabit this place.

Etrian Odyssey III - Music- Labyrinth II - Water Woods of the Submarine Ridge

Stratum BGM

Harvesting

• Mine: Jet, Phyllite, Magnetite
• Take: Green Algae, Sea Grapes, Narcissus
• Chop: Indigo Pith, Supple Sturdy Timber, Abyssal Twig

Monsters

B5F

• Red Starfish
• Whorled Puffer
• Hungry Coral
• High Onnep

B6F

• Red Starfish
• Blue Starfish
• Whorled Puffer
• Hungry Coral
• High Onnep
• Great Hermit
• Koolasuchus

B7F

• Red Starfish
• Blue Starfish
• King Starfish
• Hungry Coral
• High Onnep
• High Walrus
• Great Hermit
• Koolasuchus
• Coral Octopus

B8F

• Red Starfish
• Blue Starfish
• King Starfish
• Hungry Coral
• Rock Coral
• High Onnep
• High Walrus
• Coral Octopus
• Iron Turtle

FOEs

B5F

• Abyssal Death
• Sea Berserker (secret area through Moon Door on B6F)

B6F

• Sea Wanderer

B7F

• Scaled Dragon

B8F

• Abyssal Death
• Sea Wanderer
• Scaled Dragon (behind Star Door only)

Bosses

• Ketos (B8F)
• Anemone (B5F secret area, and only after starting quest Shrouded in the Abyss)