DecapodaEpialtidae – Kelp Crabs and Spider Crabs

Masking Crab

Loxorhynchus crispatus

This record describes Loxorhynchus crispatus (species). Recorded family: Epialtidae. Recorded order: Decapoda.

Identification and Appearance

Masking Crab - Loxorhynchus crispatus
Contributed by Chris Mallory

Classification

Kingdom
Animalia
Phylum
Arthropoda
Class
Malacostraca
Order
Decapoda (Crabs, Crayfishes, Lobsters, Prawns, and Shrimp)
Family
Epialtidae (Kelp Crabs and Spider Crabs)
Genus
Loxorhynchus

Imported taxonomy record. Source availability varies; see the source references and editorial policy below.

Habitat and Range

Geographic Range

Eastern Pacific, Northern California to Baja

About Crabs, Crayfishes, Lobsters, Prawns, and Shrimp: the wider group

Order-level background for Decapoda, the group containing Loxorhynchus crispatus. Species-specific details appear above.

Group overview

Decapoda includes ~15,000 described species of crabs, lobsters, shrimp, and crayfish. Although primarily marine and freshwater, some species like hermit crabs and coconut crabs are fully terrestrial.

Ecological role of the group

Crayfish are keystone species in freshwater ecosystems, influencing water clarity, sediment dynamics, and plant communities. Hermit crabs play vital roles in nutrient cycling on tropical islands.

Economic and practical significance of the group

The global shrimp industry alone is worth over $45 billion annually. Crayfish are important aquaculture species and invasive crayfish cause ecological damage estimated in the hundreds of millions annually in Europe and North America.

Recorded sources for this group: FAO fisheries statistics, freshwater ecology. Imported estimates may describe particular regions or reporting periods.

Explore Decapoda families and species →

How we use and review source data. Source count does not imply independent verification.

Photo credits: Contributed by Chris Mallory. Contributors retain copyright over their individual contributions.