Description: Broader then it is long, making it roughly diamond shaped, the carapace length is just over 1 cm. Colouration can vary from light yellow to reddish-brown, often with white spotting. Prominent tubercles on carapace, also often on legs. Branchial region strongly inflated, which gives noticeable raised sections on carapace. Front claws equal in length.

Habitat: Stones or gravel from lower shore to around 200 m.

Distribution: Found on all coasts around Britain and Ireland. Probably under-recorded due to being inconspicuous.

Similar Species: Could be confused with other Ebalia species. Careful inspection of carapace shape and pincers required to distinguish these species from each other.

Key Identification Features:

• Broader than it is long giving ‘diamond’ shape distinctive to Ebalia sp.
• Prominent tubercles on carapace.
• Often prominent tubercles on legs.
• Branchial region strongly inflated.

Distribution Map from NBN: Ebalia tuberosa at National Biodiversity Network mapping facility, data for UK.

iNaturalist: Ebalia tuberosa at iNaturalist World Species Observations database.

GBIF data for Ebalia tuberosa

WoRMS: Ebalia tuberosa at World Register of Marine Species. Accepted name: Ebalia tuberosa (Pennant, 1777). AphiaID: 107301.

Classification: Biota; Animalia; Arthropoda; Crustacea; Multicrustacea; Malacostraca; Eumalacostraca; Eucarida; Decapoda; Pleocyemata; Brachyura; Eubrachyura; Heterotremata; Leucosioidea; Leucosiidae; Ebaliinae; Ebalia