The Southern Seas
The Southern Seas, sometimes referred to as "the southern isles", is a geographic region within the world of Hydaelyn, located between Thavnair and Meracydia. The region was first alluded to by characters and item descriptions before becoming a playable instance in the 
Aloalo Island variant dungeon.
Geography
The Southern Seas is a warm-weathered, mostly ocean-bound region near the equator. Amidst its pristine blue waters[1] are several small islands abundant with various flora and fauna. Fish originating from this region are also sometimes encountered near the Ceiliades Margin bordering southern Aldenard.[2][3]
Aloalo Island is one of the South Sea Isles, located in the west and directly south of Thavnair.
History
The isles of the southern seas are said to be where the Lalafell people originated from, purportedly having crossed the seas to Aldenard and beyond in small catamaran-style ships made of woven reeds. The magic employed by members of the playable Arcanist class is said to originate from "geometric techniques hailing from" this region, having been brought to Aldenard by Lalafellin immigrants.[4][5][6][7]
During the Fifth Umbral Calamity, the Lalafell natives escaped to the Ninth reflection through a portal to avoid the effects of the calamity, establishing themselves as the Milalla race in that reflection.
Lore
The seas far to the south of Eorzea also teem with countless tiny islets. Excepting the occasional squall, proximity to Hydaelyn’s equator blesses these islands with a warm, pleasant climate. It is from these islands that the Lalafell originated, using catamaran-like ships unique to their civilization to travel across the boundless waters and to the Great Continents.
Interaction between Eorzea and the southern isles is remarkably abundant, with most trade going through Limsa Lominsa and its busy ports. It is also well documented that arcanima—the school from which arcanists draw their craft—originated in these isles and was brought to Vylbrand by Lalafellin immigrants to the realm. [8]
References
- ↑ Blue Marlin:"To stare at this wavekin's cerulean body is to gaze upon the unspoiled waters of the southern seas."
- ↑ Mamahi-mahi: "...this species of wavekin gave rise to every variant of mahi-mahi which now populate the expanse of the southern seas."
- ↑ Players have also theorized that an area seen in a certain post-endwalker activity, which takes place in the Cieldalaes, is somewhat close in climate to The Southern Seas.
- ↑ Arcanist
- ↑ Lalafell
- ↑ Encyclopedia Eorzea vol 1, "The Southern Seas", page 013: "proximity to Hydaelyn's equator blesses these islands with a warm, pleasant climate. [...] It is from these islands that the Lalafell originated [...] It is also well documented that arcanima--the school from which arcanists draw their craft--originated in these isles..."
- ↑ It is worth noting that some might mistake the origins of Arcanum as Meracydian, because the Arcanist class page says that they hail from "across the southern seas", but Encyclopedia Eorzea clarifies this point, saying that Arcanum "originated from these isles" explicitly.
- ↑ Encyclopaedia Eorzea: Volume I, page 13