Polyplacophora | 
Chitonida | 
Mopaliidae
			
			
			
				Environment: milieu / climate zone / depth range / distribution range				
				
					Ecology				
				
			
			
				Benthic.  Temperate			
			
			
				
			
			
			
				Eastern Pacific.
			
			
			
			
			
				Length at first maturity / Size / Weight / Age
			
			
				Maturity: Lm ?  range ? - ? cm Max length : 7.6 cm TL male/unsexed; (Ref. 296)			
			
			
							
				
				
					
						Girdle:  Medium wide covered with thick recurved bristles.  Mucro:  Slightly posterior and depressed. Sculpturing of the central area of valves and jugum:  Radiated pitting which is finer at dorsal and gets larger towards the girdle.  Lateral area:  Flat and granular and appears nearly smooth; It is definable by a slightly raised rib.  Color of the valves:  Slate blue streaked with dark brown.  Color of the girdle:  Cream (Ref. 296).					
				
				
						
			
			
			
			
				
					Maximum Total Length:  7.6 m.  Depth:  Intertidal (Ref. 290).  Habitat:  Sides or bottoms of large boulders on open coast (Ref. 315). Occurs on the sides or bottoms of large boulders in the open coast (Ref. 315); mid to low tide zones from Alaska to Point Concepcion (Ref. 312).  Herbivorous, preferring diatoms and green alga, e.g., sea lettuce Ulva sp. (Ref. 312).				
			
			
			
			
			
				Life cycle and mating behavior				
					Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae				
			
			
				
					Members of the class Polyplacophora are mostly gonochoric.  Life cycle:  Eggs hatch into lecitotrophic planktonic trocophore larvae (no veliger stage) which later metamorphose and settle on the bottom as young adults.				
			
			
			
			
			
				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  
			
			
							
			
			
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Tools
			
			
			
			
				
					More information				
				
					 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
			
			
			
							
			
			
			
			
			
						
							
				
					
						Fishing Vulnerability  					
					
					
						Low vulnerability (10 of 100).					
				
						
						
			
									
						Price category  					
					
					Unknown.