When This Cavern's Rockin'... is an achievement that requires the player to catch a raw rocktail in the Living Rock Caverns. Players may catch rocktails using a fishing rod and living minerals at level 90 Fishing. If lacking the required level, temporary skill boosts can be used.
Trivia[]
- This achievement used to be a task prior to the release of the Achievements System on 18 April 2017.
- The name of this achievement and You'd Best Come A-cookin' are a reference to the phrase "When this (room or vehicle)'s A-Rockin', Don't come A-Knockin'", indicating the inhabitants want privacy.