3rd Layer

Information

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The Great Fault
Japanese	大断層 深界三層
Rōmaji	Dai-dansō Shinkai San-sō
Information
Depth	2,600~7,000 meters
Curse	Vertigo, visual and auditory hallucinations
Required Rank	Moon Whistle
Manga Debut	Chapter 17
Anime Debut	Episode 9
Adjacent Layers
Previous	Forest of Temptation
Next	Goblets of Giants

The Great Fault (大断層 (だいだんそう) , Dai-dansō) is the third layer (深界 (しんかい) 三層 (さんそう) , Shinkai San-sō) of The Abyss. A narrow, 4 kilometers-deep gorge surrounded by countless interlocking caverns and creatures, both harmless and deadly, lurking inside.

Description

The 3^rd Layer is a 4,000 meter vertical drop down a circular shaft. The only viable way of traversing it is through a network of caverns, dens, and holes. These were likely made both naturally and by Delvers, ancient humans, and the Neritantan that live in them. The central shaft of this layer is significantly more narrow in diameter than the other layers of the Abyss, as evidenced by the Abyss Map.

This layer is home to large aerial predators, such as the Madokajack. Crimson Splitjaw are also known to use their brute strength to infiltrate the side caves in order to capture their prey. Amakagame are also located in the cave systems and can pose a threat to Delvers. However, their main source of sustenance are Neritantans and they do not actively hunt humans.

While the inner caverns mainly house non-aggressive creatures, occasionally Madokajacks will nest in the larger caves.

Once at the 6,750 meter mark, the central shaft has many spiky eggs stuck along its walls. The eggs hatch into Kazura Squid that swim in the tallest goblets in the fourth level.

An ancient "pirate ship" was seen partially exposed in the side of the Great Fault.

Here, the Curse produces the strains of previous layers as well as vertigo, nausea, and visual & auditory hallucinations.

Inner cavern housing Neritantans.

Spiky eggs embedded in the lower level of the Great Fault.

Ancient ship (pirate ship) buried in the cliff face.

Inhabitants

Species

• Amakagame
• Crimson Splitjaw
• Madokajack
• Neritantan
• Kazura Squid (Eggs)

Flora

• Baracocha
• Eternal Fortunes
• Yellow-shining Grass

Individuals

• None

Artifacts

• Thinking Stones

Points of Interest

• Baracocha Corridors
• Cumulonimbus Point
• Ghostly Roots
• Greenery Layer
• The Imprisoned Pirate Ship
• Rumbling Grounds of the Strong
• Tallowstone Layer

Trivia

• In the manga, the Amakagame is only seen as a footnote in the form of a sketch in a map detailing the progress of the group.
• In the 3^rd Layer and below, the light coming from below is actually stronger than the sunlight outside.