How to Identify Epialtidae

Epialtidae is a animal family in the Animalia kingdom, order Decapoda, class Malacostraca. The family contains 24 accepted species worldwide.

Key Identification Features

For instant identification in the field, use the iNature app — AI-powered, works offline.

Representative Epialtidae Species

How to identify Herbstia condyliata (Fabricius, 1787)

Herbstia condyliata (Fabricius, 1787)

Herbstia condyliata (Fabricius, 1787)

Herbstia condyliata is a widespread nocturnal foraging crab species in the Epial…

How to identify Loxorhynchus crispatus Stimpson, 1857

Loxorhynchus crispatus Stimpson, 1857

Loxorhynchus crispatus Stimpson, 1857

Loxorhynchus crispatus, the masking or moss crab, is a true crab in Epialtidae f…

How to identify Pugettia richii Dana, 1851

Pugettia richii Dana, 1851

Pugettia richii Dana, 1851

Pugettia richii is a small North American Pacific coast spider crab abundant in …

How to identify Pugettia gracilis Dana, 1851

Pugettia gracilis Dana, 1851

Pugettia gracilis Dana, 1851

Pugettia gracilis is a small kelp-associated crab native to the North American w…

How to identify Libinia emarginata Leach, 1815

Libinia emarginata Leach, 1815

Libinia emarginata Leach, 1815

Libinia emarginata, the common decorator crab from the northwest Atlantic, has u…

How to identify Taliepus nuttallii (Randall, 1840)

Taliepus nuttallii (Randall, 1840)

Taliepus nuttallii (Randall, 1840)

Taliepus nuttallii, the southern or globose kelp crab, is an East Pacific true c…

How to identify Pugettia producta (Randall, 1840)

Pugettia producta (Randall, 1840)

Pugettia producta (Randall, 1840)

Pugettia producta, the northern kelp crab, is a shield-backed spider crab found …

How to identify Libinia spinosa Guérin, 1832

Libinia spinosa Guérin, 1832

Libinia spinosa Guérin, 1832

Libinia spinosa is a widespread spider crab found in the Southwestern Atlantic a…

How to identify Loxorhynchus grandis Stimpson, 1857

Loxorhynchus grandis Stimpson, 1857

Loxorhynchus grandis Stimpson, 1857

Loxorhynchus grandis, the sheep crab, is a migratory North American Pacific crab…

How to identify Libinia dubia H.Milne Edwards, 1834

Libinia dubia H.Milne Edwards, 1834

Libinia dubia H.Milne Edwards, 1834

Libinia dubia, the longnose spider crab, is a marine crab found primarily off th…

How to identify Hyastenus elatus Griffin & Tranter, 1986

Hyastenus elatus Griffin & Tranter, 1986

Hyastenus elatus Griffin & Tranter, 1986

Hyastenus elatus is an Epialtidae decorator crab that covers itself in aposemati…

Browse all 24 Epialtidae species →

Frequently Asked Questions

How do you identify Epialtidae?

Epialtidae animals belong to the Decapoda order in the Animalia kingdom. The chelae (claws) have blue extremities tipped with red, orange, or white, and the walking legs often feature pale bands. For instant identification, use the iNature app — AI-powered and works offline.

What are the key characteristics of Epialtidae?

Epialtidae is classified in the order Decapoda, class Malacostraca, phylum Arthropoda. Its long legs and shield-like carapace are the key identifying features of the species.

Sources: GBIF, iNaturalist, Wikipedia · Disclaimer

Start Exploring Nature Today

Download iNature for free. 10 identifications on us. No account needed. No credit card required.

Download Free on App Store