Turtle crab

Cryptolithodes sitchensis

Turtle crab

Cryptolithodes sitchensis

Other Common Names
Umbrella crab, sitka crab, helmet crab

Rocky Coast

Other Common Names

Umbrella crab, sitka crab, helmet crab

At the Aquarium

Rocky Coast

Appearance

This crab has an expansive half-moon shaped carapace that can completely cover its 8 walking legs and 2 smooth chelipeds. The carapace comes in a variety of colors including gray, brown, scarlet, bright orange, purple, or olive while the underside of the shell is usually white. Its rostrum is widest at the tip.

Habitat

In rocky habitas in the Intertidal to subtidal depths of 49 feet.

Diet

Feeds on coralline algae

Life History

A male’s carapace can grow to 3.5 inches wide.

IUCN Status

Not Evaluated

Ecosystem & Cultural Importance

This crab feeds its predators, including the giant Pacific octopus

Alaska to California

This crab can be found in the intertidal zone.

This crab moves very slowly and relies on its carapace for camouflage. It is easily mistaken for a broken piece of shell.

Citations & Other Resources

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Since opening in 1992, the Oregon Coast Aquarium has been a premier attraction on Oregon’s central coast and an enduring advocate for the health of our ocean. For over three decades this 501(c)3 non-profit organization has supported marine wildlife and fostered environmental stewardship through its education programs, community partnerships, and rehabilitation efforts. Accredited by the Association of Zoos & Aquariums, the Oregon Coast Aquarium is consistently ranked as one of the top 10 aquariums in the U.S., providing visitors with opportunities to connect with 15,000 animals spanning 300 different species. The Oregon Coast Aquarium is located at 2820 S.E. Ferry Slip Rd., Newport, OR. Learn more about the Oregon Coast Aquarium and its vital work at aquarium.org, 541-867-3474. Follow us on Facebook or Twitter for the latest updates.

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