Ice Worm

Scientific Name: Mesenchytraeus solifugus

Order & Family: Order: Enchytraeida, Family: Enchytraeidae

Size: Approximately 15 to 25 mm (0.6 to 1 inch) in length and very thin.

Ice Worm

Natural Habitat

Glacial ice and snowfields, primarily found in the coastal ranges of Alaska, British Columbia, Washington, and Oregon.

Diet & Feeding

They feed on snow algae, pollen, and other organic debris found on the surface of glaciers.

Behavior Patterns

Ice worms are notable for their ability to thrive in freezing temperatures, displaying a unique circadian rhythm where they surface in the late afternoon and evening to feed but burrow deep into the ice during the day to avoid sunlight.

Risks & Benefits

They pose no risk to humans. Ecologically, they are a significant decomposer on glaciers, helping to cycle nutrients in these extreme environments, and serve as prey for birds like snow buntings.

Identified on: 2/23/2026