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Family Littorinidae

Periwinkles

Periwinkles are algal grazers found high above the waterline on rocky shores.  They move vertically with the tide.  They are capable of trapping water within the shell and hibernate for extended periods if required.

 

 HAWAII

 

Littoraria pintado

DOTTED PERIWINKLE

 

Echinolittorina hawaiiensis 

HAWAIIAN PERIWINKLE

 

Littoraria coccinea

SCARLET PERIWINKLE

 

Littoraria scabra

MANGROVE PERIWINKLE

 

Peasiella tantilla

KEELED PERIWINKLE

 


Family Planaxidae

Cluster Winks

Thick shells found in tight clusters on rocky shores near brackish water.

 HAWAII

Angiola zonata

DWARF PACIFIC PLANAXIS

 

Family Ellobiidae

Lamp Snails

Air-breathing snails found along rocky shorelines, especially where freshwater enters the sea.  They are related to land snails.  Formerly known as the Family Melampidae.

 HAWAII

Allochroa layardi

LAYARD'S LAMP SNAIL

 

Melampus castaneus

COFFEE BEAN SNAIL