Metal Salvage (Subnautica)

Metal Salvage is a raw material found scattered on the seabed, usually near wrecks.

In the Kelp Forest, it is picked up and gathered by Stalkers.

If the player holds one in his hand near a Stalker, it will pick it up from the player's hand, temporarily taming the Stalker in the process.

It appears to be most common in the Crash Zone and Kelp Forest biomes, but the player takes a risk in visiting these biomes early-game.