Elkonia Deep Coral Ocean Biome

Ported to Minecraft 26.2 (pack format 107.1), and the caves under the seabed are now sulfur caves.

What changed for 26.2

• Biome sky, fog and water-fog colour moved into the new environment attributes map, which is where 1.21.11 put them when it emptied those fields out of biome effects. The colours themselves are unchanged.
• • Dropped initial_density_without_jaggedness from the noise router; 1.21.9 removed it and preliminary_surface_level already did the job.
• • Pack format declared as 107.1, so 26.2 loads it without the wrong-version warning.

Sulfur caves

• Sulfur and cinnabar now make up the walls of the undersea caves, in about equal measure, the way they do in a vanilla sulfur cave.
• • Sulfur spikes grow from cave floors and ceilings, using 26.2's new speleothem feature.
• • Potent sulfur pockets sit rarely on flooded cave floors, gassing the water above them. Swim carefully.

Everything above the seabed is untouched: the same coral, kelp, sponges, fish, dolphins and glow squid, on the same terrain.

This build is for 26.2 only. Version 1.22 remains the download for 1.21.9-1.21.11.