Marine, intertidal, gravel, partially exposed, eulittoral

Gravel beaches seldom have one uniform grain size; most surveys report some sand mixed in with gravel.  Some partially exposed habitats in the Strait of Juan de Fuca have nearly uniform gravel, and very low biological diversities.  Due to the instability of the substratum, the exposed habitats are relatively unproductive with virtually no plant life, and are occupied solely by mobile burrowing animals or epibenthic forms such as shrimp. Gulls sometimes forage in these habitats, and oystercatchers may nest in high intertidal gravel areas.

Habitat attributes

Class ID: 
Class name: 
Marine, intertidal, gravel, partially exposed, eulittoral
67.0 km (in WA)
Primary substrate: 
Secondary substrate: 
Tertiary substrate: 
Substrate stability: 
Substrate key details: 
No stable surface features
Wave exposure: 
Exposed, Semi-exposed, Semi-protected
Blue book classes: 
Marine intertidal gravel: Partially exposed
Map/survey site examples: 
Dungeness Spit, Twin Rivers, Ebey's Landing, Deadman Bay
Fish sampling sites: 
Beach Seine: Twin Rivers, Dungeness Spit, North Beach, Deadman Bay, South Beach
Diagnostic species: 
  • Gammaridea
  • Sphaeromatidae
  • Hemigrapsus
  • Amphistichus rhodoterus
  • Microgadus proximus
  • Ascelichthys rhodorus
  • Psettichthys melanostictus
  • Blepsias cirrhosus
VEC common associates: 
Cancer spp.
Species notes: