All Seaweeds (Algae) and Seagrasses
Red Algae - Rhodophyta
Arched red seaweed (Fryeella gardneri)
Bushy Ahnfelt's seaweed (Ahnfeltia fastigiata)
Black pine (Neorodomela larix)
Black seaweed (Pyropia abbottiae)
Black tassel (Pterosiphonia bipinnata)
Bleached brunette (Cryptosiphonia woodii)
Bleachweed (Prionitis sterbergii)
Blue branching seaweed (Gloiocladia laciniata)
Bull-kelp nori (Pyropia nereocystis)
California limu (Gracilaria pacifica)
Callophyllis crenulata
Callophyllis flabellulata
Callophyllis heanophylla
Callophyllis pinnata
Ceramium codicola
Coarse sea lace (Microcladia borealis)
Cracked saucer (Constantinea subulifera)
Crisscross network (Polyneura latissima)
Cryptopleura lobulifera
Cup and saucer seaweed (Constantinea simplex)
Delicate sea lace (Microcladia coulteri)
Delicately-branched red seaweed (Bonnemaisonia californica)
Dwarf skein (Antithamnion defectum)
Enigmatic coral seaweed (Bossiella frondescens)
False laver (Pyropia fallax)
Farlow's seaweed (Farlowia mollis)
Feather-veined red seaweed (Membranoptera platyphylla)
Frilly red ribbon (Palmaria callophylloides)
Graceful coral seaweed (Corallina vancouverensis)
Hairy pottery seaweed (Ceramium pacificum)
Herposiphonia plumula
Hidden rib (Cryptopleura ruprechtiana)
Hymenena setchellii
Iridescent horn-of-plenty (Mazaella parksii)
Jelly moss (Gloiopeltis furcata)
Loose Ahnfelt's seaweed (Ahnfeltiopsis gigartinoides)
Mastocarpus agardhii
Mastocarpus intermedius
Mastocarpus vancouveriensis
Mazzaella californica
Narrow iodine seaweed (Grateloupia americana)
Neoptiolta hypnoides
Oregon pine (Neorhodomela oregona)
Polysiphonia hendryi var. gardneri
Polysiphonia pacifica
Polysiphonia paniculata
Polysiphonia senticulosa
Prionitis filiformis
Purple laver (Pyropia perforata)
Pyropia columbiensis
Red antlers (Scinaia confusa)
Red eyelet silk (Sparlingia pertusa)
Red opuntia (Opuntiella californica)
Red ribbon (Palmaria mollis)
Red sea-cabbage (Turnerella mertensiana)
Red sea-leaf (Erythrophyllum delesseriodes)
Rubber threads (Nemalion elminthoides)
Rusty rock (Hildenbrandia rubra)
Salishia firma
Sarcodiotheca gaudichaudii
Sea brush (Odonthalia floccosa)
Sea fern (Neoptilota asplenioides)
Sea laurel (Osmundea spectabilis)
Sea moss (Endocladia muricata)
Sea sacs (Halosaccion glandiforme)
Sea spaghetti (Gracilaria andersonii)
Seagrass laver (Smithora naiadum)
Slippery red blade (Schizymenia pacifica)
Splendid iridescent seaweed (Mazaella splendens)
Stiff red ribbon (Palmaria hecatensis)
Teal nori (Pyropia torta)
Turkish towel (Chondracanthus exasperatus)
Turkish washcloth (Mastocarpus papillatus)
Wildemania occidentalis
Winged rib (Cumathamnion decipiens)
Arched red seaweed (Fryeella gardneri)
Bushy Ahnfelt's seaweed (Ahnfeltia fastigiata)
Black pine (Neorodomela larix)
Black seaweed (Pyropia abbottiae)
Black tassel (Pterosiphonia bipinnata)
Bleached brunette (Cryptosiphonia woodii)
Bleachweed (Prionitis sterbergii)
Blue branching seaweed (Gloiocladia laciniata)
Bull-kelp nori (Pyropia nereocystis)
California limu (Gracilaria pacifica)
Callophyllis crenulata
Callophyllis flabellulata
Callophyllis heanophylla
Callophyllis pinnata
Ceramium codicola
Coarse sea lace (Microcladia borealis)
Cracked saucer (Constantinea subulifera)
Crisscross network (Polyneura latissima)
Cryptopleura lobulifera
Cup and saucer seaweed (Constantinea simplex)
Delicate sea lace (Microcladia coulteri)
Delicately-branched red seaweed (Bonnemaisonia californica)
Dwarf skein (Antithamnion defectum)
Enigmatic coral seaweed (Bossiella frondescens)
False laver (Pyropia fallax)
Farlow's seaweed (Farlowia mollis)
Feather-veined red seaweed (Membranoptera platyphylla)
Frilly red ribbon (Palmaria callophylloides)
Graceful coral seaweed (Corallina vancouverensis)
Hairy pottery seaweed (Ceramium pacificum)
Herposiphonia plumula
Hidden rib (Cryptopleura ruprechtiana)
Hymenena setchellii
Iridescent horn-of-plenty (Mazaella parksii)
Jelly moss (Gloiopeltis furcata)
Loose Ahnfelt's seaweed (Ahnfeltiopsis gigartinoides)
Mastocarpus agardhii
Mastocarpus intermedius
Mastocarpus vancouveriensis
Mazzaella californica
Narrow iodine seaweed (Grateloupia americana)
Neoptiolta hypnoides
Oregon pine (Neorhodomela oregona)
Polysiphonia hendryi var. gardneri
Polysiphonia pacifica
Polysiphonia paniculata
Polysiphonia senticulosa
Prionitis filiformis
Purple laver (Pyropia perforata)
Pyropia columbiensis
Red antlers (Scinaia confusa)
Red eyelet silk (Sparlingia pertusa)
Red opuntia (Opuntiella californica)
Red ribbon (Palmaria mollis)
Red sea-cabbage (Turnerella mertensiana)
Red sea-leaf (Erythrophyllum delesseriodes)
Rubber threads (Nemalion elminthoides)
Rusty rock (Hildenbrandia rubra)
Salishia firma
Sarcodiotheca gaudichaudii
Sea brush (Odonthalia floccosa)
Sea fern (Neoptilota asplenioides)
Sea laurel (Osmundea spectabilis)
Sea moss (Endocladia muricata)
Sea sacs (Halosaccion glandiforme)
Sea spaghetti (Gracilaria andersonii)
Seagrass laver (Smithora naiadum)
Slippery red blade (Schizymenia pacifica)
Splendid iridescent seaweed (Mazaella splendens)
Stiff red ribbon (Palmaria hecatensis)
Teal nori (Pyropia torta)
Turkish towel (Chondracanthus exasperatus)
Turkish washcloth (Mastocarpus papillatus)
Wildemania occidentalis
Winged rib (Cumathamnion decipiens)
Brown Algae - Ochrophyta
Broad-rib kelp (Pleurophycus gardneri)
Bulb seaweed (Colpomenia peregrina)
Bull kelp (Nereocystis luetkeana)
Coarse acid kelp (Desmarestia munda)
Desmarestia latissima
False kelp (Petalonia fascia)
Feather boa kelp (Egregia menziesii)
Fir needle (Analipus japonicus)
Five-ribbed kelp (Costaria costata)
Flat pompom kelp (Lessoniopsis littoralis)
Flattened acid kelp (Desmarestia ligulata)
Fringed sieve kelp (Agarum fimbriatum)
Giant kelp (Macrocystis integrifolia / M. pyrifera)
Golden sea hair (Dictyosiphon foeniculaceus)
Hairy brown seaweed (Haplogloia andersonii)
Mermaid's gloves (Dictyota binghamiae)
Net-of-cords kelp (Dictyoneurum reticulatum)
Palm kelp (Eisenia arborea)
Ribbon kelp (Alaria marginata)
Rockweed (Fucus distichus)
Sand-scoured false kelp (Phaeostrophion irregulare)
Sea cauliflower (Leathesia marina)
Sea cabbage (Saccharina sessilis)
Sea felt (Pylaiella littoralis)
Sieve kelp (Agarum clathratum)
Split kelp (Saccharina groenlandica)
Southern stiff-stiped kelp (Laminaria setchellii)
Suction-cup kelp (Laminaria yezoensis)
Sugar kelp (Saccharina latissima)
Stringy acid kelp (Desmarestia viridis)
Three-ribbed kelp (Cymathaere triplicata)
Twisted sea tubes (Melanosiphon intestinalis)
Woody-stemmed kelp (Pterygophora californica)
Broad-rib kelp (Pleurophycus gardneri)
Bulb seaweed (Colpomenia peregrina)
Bull kelp (Nereocystis luetkeana)
Coarse acid kelp (Desmarestia munda)
Desmarestia latissima
False kelp (Petalonia fascia)
Feather boa kelp (Egregia menziesii)
Fir needle (Analipus japonicus)
Five-ribbed kelp (Costaria costata)
Flat pompom kelp (Lessoniopsis littoralis)
Flattened acid kelp (Desmarestia ligulata)
Fringed sieve kelp (Agarum fimbriatum)
Giant kelp (Macrocystis integrifolia / M. pyrifera)
Golden sea hair (Dictyosiphon foeniculaceus)
Hairy brown seaweed (Haplogloia andersonii)
Mermaid's gloves (Dictyota binghamiae)
Net-of-cords kelp (Dictyoneurum reticulatum)
Palm kelp (Eisenia arborea)
Ribbon kelp (Alaria marginata)
Rockweed (Fucus distichus)
Sand-scoured false kelp (Phaeostrophion irregulare)
Sea cauliflower (Leathesia marina)
Sea cabbage (Saccharina sessilis)
Sea felt (Pylaiella littoralis)
Sieve kelp (Agarum clathratum)
Split kelp (Saccharina groenlandica)
Southern stiff-stiped kelp (Laminaria setchellii)
Suction-cup kelp (Laminaria yezoensis)
Sugar kelp (Saccharina latissima)
Stringy acid kelp (Desmarestia viridis)
Three-ribbed kelp (Cymathaere triplicata)
Twisted sea tubes (Melanosiphon intestinalis)
Woody-stemmed kelp (Pterygophora californica)
Green Algae - Chlorophyta
Acrosiphonia sonderi
Arctic sea moss (Acrosiphonia arcta)
Chaetomorpha cannabina
Dark sea lettuce (Ulvaria obscura var. blyttii)
Emerald carpet (Prasiola meridionalis)
Graceful green hair (Cladophora sericea)
Green rope (Acrosiphonia coalita)
Sea cellophane (Monostroma grevillei)
Sea hair (Ulva intestinalis)
Sea lettuce (Ulva lactuca)
Sea staghorn (Codium fragile ssp. californicum)
Smooth spongy cushion (Codium setchellii)
Trentepohlia flava
Acrosiphonia sonderi
Arctic sea moss (Acrosiphonia arcta)
Chaetomorpha cannabina
Dark sea lettuce (Ulvaria obscura var. blyttii)
Emerald carpet (Prasiola meridionalis)
Graceful green hair (Cladophora sericea)
Green rope (Acrosiphonia coalita)
Sea cellophane (Monostroma grevillei)
Sea hair (Ulva intestinalis)
Sea lettuce (Ulva lactuca)
Sea staghorn (Codium fragile ssp. californicum)
Smooth spongy cushion (Codium setchellii)
Trentepohlia flava
