An underwater torch will break instantly and drop itself when broken using anything. The tool will not take any damage when breaking the underwater torch.
Underwater torches will also be broken if pushed by a piston.
Underwater torches can be placed on the top or the sides of most solid blocks, although some will require sneaking (see placement for exceptions). Being non-solid, underwater torches have no collision box.
In general, underwater torches can only be placed on solid, opaque, full blocks; exceptions are listed below.
|Block name||Underwater torch placeable|
|Slab||Top of top-half slabs|
|Cobblestone Wall||Top only|
|Snow||Top of 8-layer thick snow|
|1.0.27||Underwater Torch was added.|
|Upcoming Bedrock Edition|
|1.2.20||build 1||Underwater Torch was added.|
Issues relating to "Underwater Torch" are maintained on the issue tracker. Report issues there.