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Barnacles are shellfish that cling to rocks or ships hulls.
barnacles
Warm and tropical waters permit faster micro-organism growth on the hull surface, increasing drag considerably. Think barnacles attaching themselves to the ship !!
A limpet clings to rock and moves round feeding when covered by a high tide. Barnacles and muscles also are clinging shellfish, though they are fixed in position and are unable to move position.
with sail stacks
Barnacles are "filter feeders" (meaning they filter their food out of the water around them. Many filter feeders compete for space on the ocean floor. Barnacles avoid this competition by attaching themselves, often in large colonies, on the tough skin of whales and the underside of ships. They feed on the food suspended in the water around the whale or ship.
Throw ropes with hooks attached to ships or even castles to scale the walls or sides of the ships.
The rigging on a ship is supported by (attached to) the masts, yards and spars.
The rigging on a ship is supported by (attached to) the masts, yards and spars.
Non-rigid
supplies came on ships attached to the invasion forces on D-Day
The Sea Dogs Had Bombs Attached To Their Tails That Dropped Off And Destroyed The Spanish Ships.