Source-backed Oyster notes for Pilgrammed Cobalt Cavern fishing, Cyrus quest context, and sale use.
Oyster is an item obtained through fishing in Cobalt Cavern. The official wiki says it is mainly useful for selling and completing the first part of Cyrus' quest, Eyes That Sea.
Use this page for Oyster searches that need Cobalt Cavern and quest-use context.
Claims stay narrow on purpose. Exact drops, rates, formulas, and locations are only published when a source supports them.
Open sourceThese rows are written to match search intent while keeping unsupported details out of the page.
Location signal: Cobalt Cavern.
Quest signal: Cyrus' Eyes That Sea quest.
Use boundary: the official wiki says it cannot be used for alchemy.
These links are the ranking path: exact entity page, parent hub, map or update context, then source policy.
Short answers for searchers who need the exact term without a long wiki crawl.
Oyster is covered from the listed source. Use this page for a short player-facing summary and follow the source link for the full official wiki context.
Broad fishing rules and fish links.
