Crab Nest Block

Crab nest blocks are blocks that spawn crabs.

Obtaining
Crab nest blocks cannot be obtained in Survival. If destroyed, even with Silk Touch, they drop nothing.

Natural Generation
3 crab nest blocks generate in every crab nest structure.

Crab Spawning
Every 30 seconds (600 ticks), a crab nest block will attempt to spawn crabs on top of it. The spawning fails if the block above it is solid. Otherwise, a popping sound is heard, and 3 crabs appear on top, then wander away.

Lore
Crabs will sometimes pick a spot to lay a significant number of eggs in, usually clustered together around protective formations such as large boulders. Eventually, these eggs will hatch, and the crabs will slowly crawl out of the sand.