Polyplacophora | 
Chitonida | 
Mopaliidae
			
			
			
				Environment: milieu / climate zone / depth range / distribution range				
				
					Ecology				
				
			
			
				Benthic.  Temperate			
			
			
				
			
			
			
				Eastern Pacific:  Canada, Alaska to Mexico.
			
			
			
			
			
				Length at first maturity / Size / Weight / Age
			
			
				Maturity: Lm ?  range ? - ? cm Max length : 5.1 cm TL male/unsexed; (Ref. 296)			
			
			
							
				
				
					
						Girdle:  Wide with sparse flat glassy hairs having several recurved spines at the base.  Mucro:  Strongly posterior.  Valves:  Beaked slightly.  Central areas:  Longitudinally ribbed and where each rib touches the lateral area there is a granular pustule.  Pustules:  Form a heavy lateral rib;  from this rib the central area rib continues at an oblique angle on the lateral areas until it again reaches a granular pustule at the posterior edge of the valve;  pustules form another granular rib along the posterior edge of each valve. Color:  Ranging from dull gray, grays with white, greens with yellows, whites with yellows, greens with red, greens with maroon with white mixed in (Ref. 296).  Body:  Oval to elongate (Ref. 290).  Girdle:   Medium wide nude; microscopically granulated fleshy.  Mucro:  Anterior.  Central areas:  Smooth.  Lateral areas:  Defined by a slightly raised rib with a smooth area inside.  Color of valves:  Blood red with white lightning marks.  Color of girdle:  Cream (Ref. 296).					
				
				
						
			
			
			
			
				
					Intertidal to shallow subtidal (Ref. 290).				
			
			
			
			
			
				Life cycle and mating behavior				
					Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae				
			
			
				
					Appears to have an annual reproductive cycle with spawning cued by spring phytoplankton (Ref. 290).				
			
			
			
			
			
				Burghardt, G. and L. Burghardt 2006 West Coast Chitons. A Gallery of Worlwide Chitons: http://home.inreach.com/burghart/wcoast.html[accessed20/01/06] (Ref. 296)
			
			
			
			
			
			
			
					
						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 composition
Food consumption
Predators
  Population dynamicsGrowth
Max. ages / sizes
Length-weight rel.
Length-length rel.
Length-frequencies
Mass conversion
Abundance
  Life cycleReproductionMaturityFecunditySpawningEggsEgg developmentLarvae   PhysiologyOxygen consumption
  Human RelatedStamps, coins, misc.
  				 
			 
			
			
			
				Internet sources
			
			
			
			
			
				Estimates based on models
			
			
			
									
						Preferred temperature  					
				 (Ref. 
115969): 6.1 - 14, mean 8.8 (based on 364 cells).			
 
			
			
			
			
			
						
							
				
					
						Fishing Vulnerability  					
					
					
						Low vulnerability (10 of 100).					
				
						
						
			
									
						Price category  					
					
					Unknown.