Lithium is a Coral Gardens resource that also continues into the mid-depth biomes. Most farmers harvest it from Great Jaw clams, the giant ambush bivalves that you'll trigger by accident at least once before you understand them. Knowing the safe approach turns a high-risk drop into a routine farm.
A Great Jaw is camouflaged on the seafloor as a coral mound. It snaps shut with high damage and a neurotoxin pulse when anything brushes its trigger zone. The Lithium is inside; you don't take damage if you approach from directly above the closed shell and tap the centre while it's already closed.
If you walk into one open, you take the bite and the toxin DOT — bring at least one First Aid Kit. The recovery time is enough for a second clam to bite if you panic-swim sideways.
Lithium is a confirmed harvestable resource of the Coral Gardens biome (0-200m). Great Jaw clams cluster on rocky cliff bases and in the mid-depth shelf zones — particularly in the Plateaus and Tufa Towers sub-regions. Look for what appears to be an oversized clam half-buried in the seafloor with a barely-visible seam.
For a comfortable progression stockpile, target 6-8 Lithium per Karakorum trip: enough for 2 Plasteel Ingots (High Capacity Air Tank + Scout Ray Chassis) plus a Current Ring with leftovers for the food chain.
