Biome
The Sunken Sea沈んだ海
An area covered in water. You will need a boat or something similar to get around.
The Sunken Sea is a biome in Core Keeper, #5 in the usual order of progress. Bosses: Morpha the Aquatic Mass, Omoroth the Sea Titan. Fish you can catch here include Bottom Tracer, Silver Dart, Golden Dart, Pink Coralotl.
Bosses in The Sunken Sea
Enemies in The Sunken Sea (4)
Items found in The Sunken Sea (119)
Items you can get in this biome from enemy and boss drops, chests, walls, fishing and breakable objects. Detailed sources and chances are on each item's page.
Dungeons in The Sunken Sea
Coral ReefLumen Coral, Large Bicolor Coral, Bicolor Coral and more
Omoroth the Sea Titan's DungeonLand Algae, Octarine Ore, Crimson Coral and more
Sea IslandsSeashell Chest, Kelp Tree, Land Algae and more
Sea Walls with ChestSeashell Chest, Octarine Ore
Small Forlorn MetropolisCavelings Stone Tile, Gemstone Stone Tile, Scholar Stone Tile and more
Scenes in The Sunken Sea (temples, ruins, camps and more)
Beached Caveling Ship IslandOceanheart Necklace, Gold Bar, Caveling Bread and more
Broken City IsleRecall Idol, Gilded Hookshot, Large Valuable Pouch and more
Coral IslandCoral Ring, Coral Amulet, Coral Wood and more
Coral-Covered IslandOctarine Sledge Hammer, Octarine Key, Rare Candy and more
Cove StashOctarine Key, Solarite Bar
No overview mapFishing DeckOctarine Sledge Hammer, Octarine Key, Rare Candy and more- No overview mapFishing IslandOctarine Sledge Hammer, Octarine Key, Rare Candy and more
Fishing IsletsWhite Coralotl, Scarlet Fishing Rod, Golden Dart and more
Giant Conch Shell Island
Glyph Parchment TreasuryGlyph Parchment, Gold Bar, Ancient Gemstone and more
No overview mapHeart Berry Soda IslandRecall Idol, Gilded Hookshot, Large Valuable Pouch and more
Large Coral Patch
Lone City IslandRecall Idol, Gilded Hookshot, Large Valuable Pouch and more
Morpha the Aquatic Mass' Arena
Octarine Island
Omoroth the Sea Titan's Arena
Research LabSeismic Clock, Catalyst Gemstone, Suspended Butterfly
Sea Harbor TownOctarine Fishing Rod, Octarine Key, Galaxite Key and more
Sea Moon LakePink Coralotl
Sea OasisOctarine Sledge Hammer, Octarine Key, Rare Candy and more
Sea Patch
Sea Pond
Sea Star IsleStarlight Shards
ShipwreckGold Bar
Skeleton IslandSpine Ring, Silver Dart, Golden Dart and more
Small PierOctarine Fishing Rod, Octarine Ore, Pearl Lantern and more- No overview mapSunken Sea Circuit PuzzleRecall Idol, Gilded Hookshot, Large Valuable Pouch and more
No overview mapSunken Sea Cove PuzzleOctarine Key, Obsidian Key
Sunken Sea Fishing Camp
Turtle Statue IslandTurtle Shell- No overview mapWaterwayOctarine Sledge Hammer, Octarine Key, Rare Candy and more
Which biome each dungeon and scene appears in is from the Core Keeper Wiki (Fandom) SceneInfo and DungeonInfo data (CC BY-SA 3.0), because scene layouts are not in the game files we can read.
Fish you can catch
| Item | Amount | Chance |
|---|---|---|
 Bottom Tracer |
1 | 32% |
 Silver Dart |
1 | 22% |
 Golden Dart |
1 | 22% |
 Pink Coralotl |
1 | 12% |
 White Coralotl |
1 | 12% |
The chance is the chance to get at least one of the item each time (opening one chest, killing one enemy or one catch). Each time, this table is rolled 1 time(s). Calculated from the drop tables in the game's configuration files (Conf/Loot, Core Keeper 1.3.0.6) the same way the game rolls them.
Other catches (not fish)
| Item | Amount | Chance |
|---|---|---|
 Scrap Parts |
1 | 21% |
 Octarine Ore |
1 | 19.7% |
 Blue Kelp |
1 | 14.1% |
 Fiber |
1 | 11.5% |
 Gold Ore |
1 | 8.2% |
 Abyssal Scepter |
1 | 4.6% |
 Hoppy Egg |
1 | 3.9% |
 Golden Jellyfish |
1 | 2.5% |
| Locked Octarine Chest |
1 | 2% |
| Octarine Key |
1 | 2% |
 Giant Squid Eye |
1 | 1.6% |
 Golden Needle |
1 | 1.6% |
| Octarine Sledge Hammer |
1 | 0.99% |
 Pearl Lantern |
1 | 0.99% |
 Large Fish Pouch |
1 | 0.99% |
 Diving Helm |
1 | 0.99% |
 Wildwarden Pants |
1 | 0.99% |
 Crescent Necklace |
1 | 0.99% |
 Polished Shell |
1 | 0.82% |
 Opabinia Fossil |
1 | 0.41% |
The chance is the chance to get at least one of the item each time (opening one chest, killing one enemy or one catch). Each time, this table is rolled 1 time(s). Calculated from the drop tables in the game's configuration files (Conf/Loot, Core Keeper 1.3.0.6) the same way the game rolls them.
The Sunken Sea guides and articles
Unless a note on the page says otherwise, numbers are read from the game files of Core Keeper 1.3.0.6 (prefabs, configuration files, drop tables and the game's program) and calculated by this site, including upgraded (per-level) values, sell prices and mana costs. Names and descriptions are the game's official English text. Only reinforcing materials, minion and pet attacks and some food values are based on the Core Keeper Wiki (Fandom) data (CC BY-SA 3.0). Core Keeper and its images are © Pugstorm. This is an unofficial fan site.