4 tidal zones

4 TIDAL ZONES

1. 
   High Tidal Zone: *periwinkle snails
   

• 
  Lichens
  
• 
  Limpets
  
  1. 
     Chitons found in upper and upper midtidal
     

2. 
   Upper Mid-tidal: * balanus
   
   1. 
      Grey barnacle higher
      
   2. 
      White displaces lower
      
3. 
   Lower mid-tidal: cal muscle
   
   • 
     Lottia farm
     
   • 
     Gooseneck barnacle
     
4. 
   Lower Zone: Surf grass / kelp
   
   • 
     Sponges majority textured
     
   • 
     Tunicates majority slimy
     
   • 
     Anemones
     
   • 
     Hydroids
     
   • 
     Welks
     
   • 
     Sea stars
     
   • 
     Nudibranchs
     

Anemones: 3 main spp all anthoplura

1. 
   eligantisama – ¼ sized white aggregate- decorate w/shells
   
2. 
   sola- peach colored- rays on oral disc
   
3. 
   xanthagramatica- large green
   

Baranacles:

1. 
   Thamalus - oval- overlapping plates
   
2. 
   balanus - diamond shaped plates sink in
   
3. 
   tetrachitra- larger pink
   
4. 
   polupes calimerus – goose-necked barnacles
   

Gastropods:

*herbivores

1. 
   tegula brunea - larger tegula more conical green shell found lower mid
   
2. 
   lottia gigantea – secretes mucous providing fertilizer for microalgae
   
3. 
   lottia scabra - limpet with scalloped edge
   
4. 
   lottia digitalis – smooth edged scallop
   
5. 
   litterina – small black
   
   1. 
      carnivores
      
6. 
   dog welk- conch shell shape w/o tooth
   
7. 
   acanthinea – conch shell shape w/ tooth to drill into muscles
   

Chitons:

1. 
   nettilina long, skinny, narrow plate margin
   
2. 
   mopalia bristly, oval, larger
   

Starfish

• 
  pisaster ochreaceus – purple and orange
  

Urchin

• 
  strongylucentra purpuratus
  
• 
  frasoscaus – larger reddish
  

Crab

Cancer – animerious - Large

Pacygrapsis - lined shore crab

- hermit crabs

Trimusculus orticulatus