Mangrove Roots

Mangrove roots are decorative blocks that form as part of mangrove trees. Mangrove roots, despite being a full block, can be waterlogged and will not flow water out.

Breaking
Mangrove roots can be broken by hand, but using an axe speeds up the process. Mangrove roots drop themselves when broken with any tool.

Redstone
Redstone circuits can pass their power level through mangrove roots and power other redstone components that are adjacent to the block, even when waterlogged. Waterlogged mangrove roots follow the same mechanics as any other waterlogged block.

Fuel
Mangrove roots can be used as a fuel in furnaces, smelting 1.5 items per block.

Composting
Mangrove roots have a 30% chance of increasing the compost level in a composter by 1.

Note Blocks
Mangrove roots can be placed under note blocks to produce "bass" sounds.

Trivia

 * The Mangrove Roots is the first waterloggable full block in Java Edition.
 * In Bedrock Edition, any block can be waterlogged through editing.