Gumboot Chiton

Largest of Them All


Large, elongated, flat mollusks with eight plates on its back
Up to 13" long and 5" wide
Largest chiton in the world

  • Low Intertidal Zone
  • Rocky, Soft bottom

"Clamming Up" To Change

  1. Dessication
  2. Salinity
  3. Oxygen

Special Adaptations

  • Rolls into a ball
  • 8 plates on its shell makes it harder for predators to get through
  • Secretes mucus that swells in contact with water to keep organisms from settling on it


  • Use muscular foot
  • Likes to cling to rocks
  • Moves very slow


Eats by using a radula, tongue like with many teeth


  • Algae, sea lettuce, giant kelp

  • Sea stars
  • Snails
  • Seagulls

Interesting Facts

  • Only feeds at night
  • Home to yellow polychaete worm; Cleans gills and feed on organic matter