From Metroid Wiki
Worker Splinters are insect-like creatures found on Aether. They gather resources for the Splinter Hive. Unlike regular Splinters, Worker Splinters are not aggressive. Samus encounters them in the Temple Grounds.
- "Low-threat target. Generates webbing for use in its duties. The Worker Splinter is bred for service, not combat. It spends its time collecting foodstuffs and raw material for the Hive. A layer of mucus helps to protect the creature from the toxins and chemicals it often works with. They can generate a sturdy, pliable webbing, useful in travel throughout the Hive." — Logbook "Worker Splinter" (Metroid Prime 2: Echoes)