What is the underground water biome in calamity?

Biomes - Calamity Mod Wiki

Terraria Calamity Mage

Arsenal Labs - Official Calamity Mod Wiki

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Terraria Calamity Mod. ENG/ESP

Terraria Calamity Mod Music - sanctuary - Theme of the Sunken Sea

Sunken Sea - Calamity Mod Wiki

Sunken Sea Guide! Like and Follow for More! (music used: sanctuary by

I was playing Calamity only to find this abomination of an ocean biome what in gods name caused a bottomless pit to form in the ocean? It literally leads to the worlds

Playing on calamity mod. I need to know this biome and what it is please answer fast : r/Terraria

I can't find my Sunken Sea biome, any help would be greatly appreciated. I wonder if it didn't spawn because my one underground desert goes all the way to hell. : r/CalamityMod

Terraria Calamity Mod 1.4: Exploring, Collecting Resources, and Upgrading Armor — Eightify

Anyone know why water leaks in, within sulfur sea in Calamity? I've tried replacing the walls already : r/Terraria

Desert Scourge + Sunken Sea biome Calamity Death Mode Rogue Class Let's Play, Episode #3

NEW Draedon Arsenal Labs - Terraria Calamity Rust & Dust World Generation Structures (Update 1.4.5)