Gumboot Chiton
ExploreInvertebrate
Gumboot Chiton
cryptochiton stelleri
The Gumboot Chiton (Cryptochiton stelleri), affectionately nicknamed the 'wandering meatloaf', holds the unique title of the largest chiton species in the world. Unlike its smaller, heavily armored relatives, this peculiar marine mollusk has completely internalized its protective shell. Instead of visible dorsal plates, it boasts a thick, leathery, brick-red mantle that gives it an uncanny resemblance to a discarded piece of meat or an overgrown potato resting in a tide pool. Found along the rugged, wave-swept coastlines of the North Pacific, it slowly glides over rocks using a large, muscular foot. Despite its sluggish and unassuming appearance, this gentle giant is a fascinating marvel of marine biology, possessing iron-tipped teeth capable of effortlessly scraping tough algae from jagged rocks. Want to find and snap Gumboot Chiton yourself? Get the Snappit app.
Habitat: Found clinging tightly to rocky substrates in low intertidal and shallow subtidal zones along the wave-swept coasts of the North Pacific Ocean.
Appearance
The Gumboot Chiton is instantly recognizable by its large, elongated oval shape and its thick, leathery, reddish-brown to brick-red skin (mantle). It can grow up to 36 centimeters long and weigh over a kilogram, making it significantly larger than any other chiton. Unlike other species in its class, its eight butterfly-shaped shell plates are entirely hidden beneath its tough skin, making the dorsal surface look smooth, velvety, and somewhat lumpy. If overturned, its underside reveals a pale, yellowish-orange muscular foot surrounded by a fleshy groove containing its gills.
KingdomAnimaliaPhylumMolluscaClassPolyplacophoraOrderChitonidaFamilyAcanthochitonidaeGenusCryptochiton
Category
InvertebrateRarity
Common
Danger
1/5 · Very low
Snaps
Be the first to snap!
Interesting facts
In the past, Indigenous peoples of the Pacific Northwest and early Russian settlers occasionally ate this chiton, though it is famously tough, rubbery, and notoriously bland.
It is affectionately nicknamed the 'wandering meatloaf' because of its brick-red, lumpy appearance and remarkably sluggish nature.
Its teeth are coated in magnetite, meaning they contain enough naturally occurring iron to be easily picked up by a household magnet.
The white, calcified plates hidden inside its back are shaped exactly like butterflies. When a chiton dies and decays, these wash ashore and are often mistaken for fossilized insects by beachcombers.
Special abilities
Ability
Magnetic Iron Teeth
Its radula (tongue-like structure) is lined with teeth capped with magnetite, an extremely hard iron ore that allows it to efficiently scrape tough algae from rocks without wearing down.
Ability
Internalized Armor
It has eight heavily calcified, butterfly-shaped plates embedded entirely beneath its leathery skin, providing structural support and protection while remaining completely hidden from view.
Ability
Wave-Resistant Suction
Its massive, muscular foot acts as a powerful suction cup, allowing it to withstand crashing waves and powerful currents in turbulent intertidal zones without being dislodged.
Measurements & details
- Length
- 15-36 cm
- Weight
- 0.5-2 kg
- Lifespan
- 20-40 years
- Clutch Size
- 15000-95000
- Incubation
- 3-5 days
Diet & Feeding
It is a slow-moving benthic grazer that sustains itself by scraping various types of marine algae and kelp off rocky surfaces.
Age differences: Larvae are non-feeding and planktonic for a few days, whereas adults are strictly benthic grazers.
Primary Foods
- Giant Kelp
- Red Algae
- Sea Lettuce
- Diatoms
Foraging Method
- Grazing
Ecological connections
eaten by
Sunflower Sea Star
Pycnopodia helianthoides
Giant sea stars are one of the few natural predators capable of attacking and consuming adult gumboot chitons.
eaten by
Sea Otter
Enhydra lutris
Sea otters occasionally forage for gumboot chitons, using rocks to pry them off their substrates.
host to
Commensal Scale Worm
Arctonoe vittata
Frequently hosts this scale worm in its pallial groove, providing the worm shelter without being harmed.
eats
Giant Kelp
Macrocystis pyrifera
The chiton acts as an important grazer in kelp forest ecosystems, primarily feeding on fragments of this kelp.
Traits
No trait badges are assigned for this object yet.
Also known as
No aliases listed yet.
Collections
Collections for this object will appear here as more themes are added.
Safety
Danger
1/5 · Very low
No special safety notes yet.
Frequently Asked Questions
How to identify Gumboot Chiton?
The easiest way to identify Gumboot Chiton is to use the Snappit nature identifier app.
How long is Gumboot Chiton?
15-36 cm
How much does Gumboot Chiton weigh?
0.5-2 kg
How long does Gumboot Chiton live?
20-40 years
What does Gumboot Chiton eat?
It is a slow-moving benthic grazer that sustains itself by scraping various types of marine algae and kelp off rocky surfaces.
Where is Gumboot Chiton usually found?
Found clinging tightly to rocky substrates in low intertidal and shallow subtidal zones along the wave-swept coasts of the North Pacific Ocean.
How does Gumboot Chiton hunt?
Grazing
How many eggs does Gumboot Chiton lay?
15000-95000
Snap Map
Zoom in to split clusters and explore where this object has been snapped.
Loading map…
Recent Snaps
Recent snaps will appear here as new observations are added.
Where to spot
Park30 sightings12 species
California, US
Arena Cove Historic District
You might spot Harbor Seal, Ochre Sea Star, and Sea Thrift.
View guide →
Park30 sightings12 species
California, US
King Range
You might spot Northern Elephant Seal, Gumboot Chiton, and Ochre Sea Star.
View guide →
Park29 sightings12 species
Washington, US
Port Townsend Historic District
You might spot Mule Deer, Yellow Sand Verbena, and Bald Eagle.
View guide →
_(14534156278).jpg&width=800)
.jpg&width=800)
.jpg&width=800)
