Gastropoda | 
Trochida | 
Tegulidae
			
			
			
				Environment: milieu / climate zone / depth range / distribution range				
				
					Ecology				
				
			
			
				Benthic.  Subtropical			
			
			
				
			
			
			
				Eastern Pacific:  British Columbia, Canada to Mexico.
			
			
			
			
			
				Length at first maturity / Size / Weight / Age
			
			
				Maturity: Lm ?  range ? - ? cm Max length : 3.0 cm SHD male/unsexed; (Ref. 95344); common length : 2.5 cm TL male/unsexed; (Ref. 312); max. reported age: 28 years (Ref. 2823)			
			
			
							
				
				
					
						Shell is thick and dark purple to black; foot is black on the sides (Ref. 312).					
				
				
						
			
			
			
			
				
					It has a shell length of 2.5 cm.  Fisheries:  Over-harvesting for food in the early 1900s, mainly  by Southern European immigrants,  caused a drastic drop in population numbers.  Today they are still harvested by both Americans of Southern European and Asian ancestries; heavy regulation by the Department of Fish and Game has allowed populations to recover (Ref. 312). Habitat:  Occurs in high to middle intertidal zones on rocky surfaces or in pools not covered in algae.  Diet:  eats many species of algae including micro and macroscopic.  Life span:  up to 25 years (Ref. 312).				
			
			
			
			
			
				Life cycle and mating behavior				
					Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae				
			
			
				
					Members of the order Archaeogastropoda are mostly gonochoric and broadcast spawners.  Life cycle:  Embryos develop into planktonic trocophore larvae and later into juvenile veligers before becoming fully grown adults.				
			
			
			
			
			
				Gallivan, G. and J. Danforth 1999 Phylum Mollusca. Marine Science Institute. Http://216.239.51.104/search?q=cache:EEiLeA0OeAMJ:www2.ucsc.edu/simp/guide.pdf+Nuttalina+californica&hl=tl&gl=ph&ct=clnk&cd=8 [accessed 20/01/06] (Ref. 312)
			
			
			
			
			
			
			
					
						IUCN Red List Status    
						 (Ref. 130435: Version 2025-1)
					
					
					
				
			
			
			
			
				CITES status   (Ref. 108899)
			
			
				
					Not Evaluated				
			
			
			
			
			
			
				
					Not Evaluated				
			
			
			
			
			
				Threat to humans  
			
			
				
									
			
			
			
			
			
			
			
			
				Human uses  
			
			
							
			
			
				 | FishSource | 			
			
			
			
			
			
Tools
			
			
			
			
				
					More information				
				
					 Trophic EcologyFood items (preys)Diet compositionFood consumptionPredators   Population dynamicsGrowthMax. ages / sizesLength-weight rel.Length-length rel.Length-frequenciesMass conversionAbundance   Life cycleReproductionMaturityFecunditySpawningEggsEgg developmentLarvae   PhysiologyOxygen consumption
  Human RelatedStamps, coins, misc.
  
			 
			
			
			
				Internet sources
			
			
			
			
			
				Estimates based on models
			
			
			
									
						Preferred temperature  					
				 (Ref. 
115969): 9.5 - 17.9, mean 11.1 (based on 132 cells).			
 
			
			
			
			
			
						
							
				
					
						Fishing Vulnerability  					
					
					
						Moderate vulnerability (45 of 100).					
				
						
						
			
									
						Price category  					
					
					Unknown.