Spiny lobster occur primarily in rocky reef habitats up to 65m deep, with a habitat range from the Gulf of California and Baja Mexico to San Luis Obispo. Occasionally, they can be found in Monterey Bay during warm years and a few individuals have been noted as far North as Bodega Bay.
P. interruptus are omnivorous detritivores that regulate populations of Mytilus californianus and Strongylocentrotus purpuratus, using mandibles to break into the invertebrates’ hard exteriors. The California spiny lobster is primarily nocturnal in an effort to avoid detection by their predators, Semicossyphus pulcher and other fishes, and are hosts to commensal and parasitic symbionts.
Further reading: https://eol.org/pages/46516755 https://animaldiversity.org/accounts/Panulirus_interruptus/