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Submerged Ruins

Last updated: January 19, 2026

Submerged Ruins

Submerged Ruins underwater area

Tidus awakens in water. Swim northeast to find stairs. On the eastern side, grab . Swim northwest to find the Al Bhed Compilation Sphere - south of it on the platform is .

Al Bhed Compilation Sphere

If you've played Final Fantasy 10 before, you can transfer collected Al Bhed Primers from another save file at the Compilation Sphere. New players can skip this.

Swim north following the minimap arrow until you reach a Save Sphere. Take the first left for a . Return to the main path and head north. Tidus falls into the water - swim toward the distant Save Sphere to trigger a boss fight.

Boss: Geosgaeno

Geosgaeno Boss

Attack the Sahagin until Geosgaeno appears. This fight is unwinnable - just attack until it ends.

Ancient Ruins - Corridor & Hall

Ancient Ruins main hall

After escaping Geosgaeno, Tidus washes up inside a ruined temple. Progress through the corridor into the main hall. Save at the Save Sphere in the southwest corner.

Flint item location

In the room next to the save sphere, examine the box to obtain Flint. You'll need this to progress.

East of the hall is a locked door - to its right, grab an . Head north through the hall. Before climbing the stairs, grab an . Climb the stairs to find a at the top. Proceed through the door to find a at the end.

Return to the main hall and examine the fire pit in the center. Use the Flint to light a fire.

Boss: Klikk

Klikk Boss battle

A mechanical fiend bursts through the ruins. Klikk is your first real boss.

Salvage Ship - Sphere Grid Tutorial

On deck, speak with the Al Bhed girl. She explains the Sphere Grid - FFX's character progression system. Unlike traditional leveling, characters move along a grid of nodes, spending spheres to activate stat boosts and abilities.

Talk to an Al Bhed crew member to receive . Before leaving the deck, head to the back of the ship near the railing.

Al Bhed Primer Vol. I location

Underwater Salvage Mission

Diving underwater from salvage ship

The Al Bhed want help exploring submerged ruins. Dive down using the chain. You'll face random encounters against Piranhas (50-150 HP)—weak but annoying in groups. Use the Save Sphere in the underwater ruins to restore HP and MP.

Boss: Tros

Tros boss battle underwater

At the bottom of the ruins, a predatory fiend guards the salvage site. Tros is more dangerous than Klikk and introduces the Trigger Command system.

After defeating Tros, return to the ship. Save your progress and speak with the Al Bhed girl again.

Sin's Attack

Rikku formally introduces herself and agrees to take Tidus to Luca. Before they can set course, Sin attacks the ship and Tidus is thrown overboard.

Treasure Chests

This chapter contains 10 collectible items. The Al Bhed Primer can be obtained later in Bikanel Desert if missed, but save yourself the backtracking and grab it now.

Potions x2
Submerged Ruins - south of the Al Bhed Compilation Sphere
200 Gil
Submerged Ruins - eastern side before heading north
Hi-Potion
Underwater Hall - left path from the Save Sphere
Flint
Ancient Ruins Hall - examine the box in the side room
X-Potion
Ancient Ruins Hall - east of the locked door
Ether
Ancient Ruins Hall - near the northern entrance
Withered Bouquet
Ancient Ruins Hall - top of the stairs
Hi-Potion
Ancient Ruins Hall - second floor
Potions x3
Salvage Ship - given by Al Bhed crew member
Al Bhed Primer Vol. I
Salvage Ship deck - near the back railing