Hi - this is the page for the now extinct Sooty Crayfish - https://www.inaturalist.org/taxa/71070-Pacifastacus-nigrescens.
I plan to keep my eye out for it on Mount Diablo, never know, an extinct flower was discovered there end of 90s.
Anyway this is the source for the photo used:
Note that the caption for the image is “Astacus nigrescens fortis Faxon. Male. Type. Fall R., Fall City Mills Cal., Aug 29, 1898” (note that both Sooty and Shata were moved into genus Pacifastacus)
Asacus nigrescens fortis has been elevated to species status as Pacifastacus fortis
That linked page indicates the photo was used in a 1914 paper by Faxon, Walter
1914 is when a Faxon described the Shasta Crayfish (endangered but still extant)
Fall R. Fall City Mills is most certainly referencing Fall River, Fall River Mills in Shasta County - fed by the Pitt River which is the only place the Shasta Crayfish can still be found.
Anyway I have a suspicion the image of a “Sooty Crayfish” that iNaturalist is using is actually an image of the Type Specimen for the Shasta Crayfish.
Could a curator please look into this?