| Even if everything has been predestined, will you not oppose it?|
This page contains spoilers pertaining to the plot or storyline of this game. Read on at your own risk, especially if you haven't played this game!
|Skip Travel Points||9|
|Exits To|| Alcamoth|
High Entia Tomb
|Mutually Exclusive Sidequests||3|
|Appears In||Xenoblade Chronicles|
Eryth Sea, at the head of the Bionis, is a massive ocean where transporters are used to travel between the hovering islands, called Hovering Reefs. Led here by Melia after defeating the Telethia, Shulk and company are here in search of the tower that Shulk saw in a vision outside of Colony 6.
But in order to get there, Shulk and the party will have to travel to Alcamoth, the Imperial Captial and home of the High Entia people.
 A Boundless Sea of Wonders
Upon reaching Eryth Sea, it is revealed that the sky seen in Makna Forest is actually Eryth Sea, making this area a wonder to behold. Every so often, water from the sea reaches Valak Mountain, the cause of the relentless blizzards and endless snowfall in the area. The area also has another claim to fame: meteor showers, composed of condensed Ether that falls from the sky. Alcamoth is safely suspended above the sea
By following the transporters the party eventually reaches the transporter to the capital. It is here in which they are greeted by a squad of High Entia troops who greet Melia and call her "Lady", much to the confusion of the party.
Melia has to go on ahead and speak to the Emperor, but shortly after she steps through the transporter, Shulk and his friends are captured!
 Saving the Worker
After the group is questioned by the High Entia's divine seer, turning out to be none other than Alvis, the group is interrupted by an Imperial Guard, reporting an SOS at Eryth Sea where they've lost all contact with that squadron.
Go to Hovering Reef 4 and speak to the Alcamoth Citizen highlighted by the Quest Diamond. to find out what's You'll then be directed to the Ether Crystal Deposit, which is accessed via Hovering Reef 6. Defeat the four Defensive Kromar to save the Worker.
 Journey to Prison Island
After rescuing Melia from an assassination attempt at the hands of an agent of the Bionite Order, you'll be able to open the path to Prison Island. Proceed to Khatorl Seal Island and Soltnar Seal Island, releasing the seals on each island, then return to Hovering Reef 7 to open the way.
Both Islands have monsters that will get in the way. There is a path around some of the Kromars on Soltnar Seal Island, equipping an Earth Cloak gem here can come in handy to ensure you aren't detected if you're having trouble with the lot, especially the Subterranean Zomar.
A Skyray will fly down once the final seal is undone, and the only way to proceed is to defeat it!
 Post-Mechonis Core
After the events of Mechonis Core, the surviving High Entia that fled the capital will be taking refuge on Hovering Reef 4 at the Syrath Lighthouse and the Ether Plant past Hovering Reef 10.
Also, be careful around the various islands after Mechonis Core: they will also have Telethia mixed in with the enemies that are also in the area!
- Electric: Ether Crystal Deposit, reached via Hovering Reef 6
- See Eryth Sea/Sidequests for further Sidequest details
 Story Enemies
 Quest-Exclusive Enemies
 Additional Enemies
- See Eryth Sea/Monsters for a complete list of Monsters in Eryth Sea, along with Unique Monsters.
- See Eryth Sea/Collectopaedia for full details of the items that are in the Collectopaedia.
- Fish Fly! Fish Fly!
- Riki Have Question
- A Gift for a Loved One
- Flowers of Eryth Sea