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Updated 10/4/2025

Phylum Mollusca, Class Bivalvia

Bivalves

Mollusks with left & right shells called valves attached by a hinge.  The muscular foot is reduced in some families.  Sessile species are typically attached to the substrate by tough byssal threads.  They feed by filtering phytoplankton & bacteria from the water column and may not be safe to consume after blooms of toxic dinoflagellates, sometimes referred to as red tides.

 

HAWAII - ENDEMIC

Calloarca nuttingi 

NUTTING'S ARK

 

Barbatia oahua 

OAHU ARK

 

 

 

Pteria brunnea 

WINGED PEARL OYSTER

 

Pinctada galtsoffi 

HAWAIIAN PEARL OYSTER

 

Isognomon incisus   



INCISED PURSE SHELL
Isognomon californicus 

BLACK PURSE SHELL

 

Laevichlamys cookei 

COOKE'S SCALLOP

 

Bractechlamys langfordi 

LANGFORD'S SCALLOP

Pascahinnites coruscans hawaiensis

HAWAIIAN DWARF SCALLOP

 

Haumea loxoides

JUDD'S SCALLOP

 

Pecten waikikius

WAIKIKI SCALLOP

 

Spondylus gloriosus 

GLORIOUS SPINY OYSTER

 

 

Limaria auaua 

'AU'AU FILE SHELL

Limaria keohea 

KEOHEA FILE SHELL

 

Limaria lahaina 

LAHAINA FILE SHELL

 

Tucetona arcodentiens

HAWAIIAN GLYCYMERIS

 

Vasticardium hawaiense

HAWAIIAN COCKLE

 

Brachidontes crebristriatus 

HAWAIIAN MUSSEL

 

Hitia ovalis   

OVAL CLAM

 

Nesobornia hawaiensis 

GLASSY CLAM

 

  Pinguitellina nucella 

NUT TELLIN

 

Kellia hawaiensis   

HAWAIIAN KELLIA

Lingula reevei 

HAWAIIAN BRACHIOPOD

 

 

   

INDO-PACIFIC / HAWAII

Lamarcka ventricosa

VENTRICOSE ARK

 
Acar plicata

PLICATE ARK

 

Calloarca tenella

SMOOTH ARK

 

Septifer cumingii

CUMING'S MUSSEL

 

Leiosolenus mucronatus

BORING MUSSEL

 

Hiatella arctica

ARCTIC BORER

Pinna muricata

PRICKLY PEN SHELL

 

Streptopinna saccata

BAGGY PEN SHELL

 

Gastrochaena cuneiformis

WEDGE BORER

 

Pinctada radiata

RAYED PEARL OYSTER

 

Isognomon perna

BROWN PURSE SHELL

 

Isognomon legumen

FRAGILE PURSE SHELL

 

Spondylus candidus

CLIFF OYSTER

 

Spondylus nicobaricus

NICOBAR SPINY OYSTER

 

Hyotissa inermis

IMBRICATE OYSTER

 

Hyotissa numisma

COIN OYSTER

 

Chama limbula

 

PURPLE-LIP JEWEL OYSTER

 

Chama asperella

WHITE JEWEL OYSTER

 

Chama macerophylla

LEAFY JEWEL OYSTER

 

Chama pacifica

PACIFIC JEWEL OYSTER

Crassostrea gigas

JAPANESE OYSTER

 

Dendostrea sandvichensis

HAWAIIAN OYSTER

Ctena bella

BEAUTIFUL CLAM

 

Modiolus matris

MOTHER'S MUSSEL

Quidnipagus palatam

EDIBLE TELLIN

 

Scutarcopagia scobinata

RASP TELLIN

 

Jactellina clathrata

OBLIQUE TELLIN

 

Scissulina dispar

SEPARATED TELLIN

 

Tellinella crucigera

RED-STREAKED TELLIN

Tonganaella perna

FOLDED TELLIN

 

Periglypta reticulata

RETICULATED CLAM

 

Semele australis

AUSTRAL CLAM

Lioconcha hieroglyphica

HIEROGLYPH CLAM

 

Ruditapes philippinarum 

MANILA CLAM

 

 

Euanodontia hawaiensis

INFLATED CLAM

 

 

   

INDO-PACIFIC

Limaria fragile

FRAGILE FILE SHELL

Pedum spondyloideum

BORING SCALLOP

 

Tridacna gigas

GIANT CLAM

 

Tridacna crocea

CROCUS CLAM

 

Tridacna maxima

MAXIMA GIANT CLAM

 

Tridacna noae

NOA'S GIANT CLAM

Tridacna squamosa

SCALY GIANT CLAM

 

Tridacna derasa

SMOOTH GIANT CLAM

Brachidontes sp. B

MUSSEL

 

Scintilla philippinensis

SCINTILLA CLAM

   

NORTHEAST PACIFIC

Chlamys rubida

PACIFIC PINK SCALLOP

 

Chlamys hastata

SPINY SCALLOP

 

Crassadoma gigantea

ROCK SCALLOP

 

Mytilus californianus

CALIFORNIA MUSSEL

 

Mytilus edulis species complex

BLUE MUSSEL