Surface Tension - Expanding Minecraft's Underwater World
This compact mod significantly enriches Minecraft's oceanic expanses, adding new elements for exploration and construction.

Main Features
Air bubbles appear in underwater caves, restoring oxygen supply. Also added is a claw grabber - a special item that increases block placement and breaking range when used.
New Blocks
Tension Rod - crafted from copper blocks and their variants, prevents water from flowing downward in a 3×3 block area.
Geyser Blocks - sand and gravel versions that create bubble particles underwater and are unaffected by gravity.
Drying Hook - decorative element allowing cod and salmon to be dried over campfires. Dried fish provides water breathing effect for 10 seconds.
Net - decorative block that allows entities to pass upward but blocks downward movement.
Plankton Bush - underwater plant emitting plankton particles. Barnacle clusters placed beneath it within a 3×3 block radius gradually grow over time.
Barnacles - decorative elements found in sunken chests. Can be mounted on any side of blocks, come in three cluster sizes. Adding new barnacles increases existing cluster size.
Dock Post and Dock Net - decorative dock elements that connect to each other.
Coral Shelf and Dead Coral Shelf - decorative blocks generating in ocean biomes, similar to Minecraft's standard corals.
New Mobs
Bubble - slowly rises in water until hitting an obstacle or leaving water. Contact with player restores air supply.
Crab - creature from Minecraft mob voting, inhabits mangrove forests. Use shears to obtain large claw.