Cave bug larva

Cave Bug Larvae are young cave bugs that inhabit the swamp caves beneath the Lumbridge area. Unlike their adult relatives, they cannot be attacked or interacted with in any way.

Larvae are still very young, not yet capable of combat or anything beyond merely crawling on the cave floor. When the player enters a cave without a light source, they are attacked by small bugs; whether these are the cave bug larvae or another species of insect is unknown.

Trivia

 * On an older layout of the official RuneScape website, cave bug larvae often appeared on the home page next to recent updates.