How to Distinguish from Similar Species:Mytilus californianus is similarly shaped but is usually even more elongated, has coarse radiating ribs, often has an eroded surface, grows much larger, and is most common on the outer coast. Horse mussels such as Modiolus modiolus usually have dark brown , hairy periostracum. This species is very difficult to distinguish morphologically from M. galloprovincialis, which is found from San Francisco south, and from M. edulis, which is found in the Atlantic Ocean.
Depth range based on 86 specimens in 1 taxon.
Water temperature and chemistry ranges based on 69 samples.
Environmental ranges
Depth range (m): -14 - 27
Temperature range (°C): 7.165 - 10.151
Nitrate (umol/L): 2.084 - 6.725
Salinity (PPS): 6.151 - 31.893
Oxygen (ml/l): 6.561 - 8.227
Phosphate (umol/l): 0.286 - 1.030
Silicate (umol/l): 9.489 - 20.289
Graphical representation
Depth range (m): -14 - 27
Temperature range (°C): 7.165 - 10.151
Nitrate (umol/L): 2.084 - 6.725
Salinity (PPS): 6.151 - 31.893
Oxygen (ml/l): 6.561 - 8.227
Phosphate (umol/l): 0.286 - 1.030
Silicate (umol/l): 9.489 - 20.289
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