Java Edition 18w08a

18w08a is the twenty-first snapshot released for 1.13.

Additions

 * World generation
 * Added underwater caves and ravines.


 * Biomes
 * Added  (Warm Ocean),   (Lukewarm Ocean),   (Cold Ocean),   (Warm Deep Ocean),   (Deep Lukewarm Ocean),   (Deep Cold Ocean), and   (Deep Frozen Ocean).


 * Commands
 * Added a clickable teleport link to the command output.

Changes
Sounds
 * Added a new sound effect of squids shooting ink;
 * Added a new sound effect of bubble columns.