Bleach Weed

Prionitis lanceolata

Color: Red (Purple)
Shape: Branching
Texture: Smooth
Size: 10–15”
Zone: Intertidal
Range: Alaska to Mexico

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Bull Kelp, Bullwhip Kelp

Nereocyctis luetkeana

Color: Brown (Golden or Dark)
Shape: Branching, Tube-like
Texture: Smooth
Size: Up to 100’+
Zone: Subtidal
Range: Alaska to California

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Dead Man’s Fingers, Sea Sac

Halosaccion glandiforme

Color: Red, Brown, Green (Dark Purple-Red to Golden Brown to Yellow-Green)
Shape: Pod-like
Texture: Smooth
Size: Up to 8”
Zone: Intertidal
Range: Alaska to California

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Dulse, Red Ribbon, Red Kale

Palmaria mollis

Color: Red
Shape: Irregular Blades
Texture: Smooth
Size: 8–10”
Zone: Intertidal to Subtidal
Range: Alaska to Mexico

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Feather Boa

Egregia menziesii

Color: Brown (Olive)
Shape: Branching, Bushy
Texture: Bumpy
Size: Up to 30’+
Zone: Low Intertidal to Subtidal
Range: British Columbia to Mexico

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Green Rope

Acrosiphonia mertensii

Green Rope on RockPatch of Green Rope in Tide Pool

Color: Green
Shape: Rope-like
Texture: Furry
Size: Up to 10”+
Zone: Intertidal
Range: Alaska to California

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Green String Lettuce

Enteromorpha linza

A Cluster of Green String Lettuce Surrounding a RockHolding Up Green String Lettuce and HoldfastGreen String Lettuce

Color: Green (Bright)
Shape: Irregular Blade
Texture: Smooth
Size: Up to 20”
Zone: Intertidal
Range: Alaska to Mexico

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Green Tuft, Green Ball

Cladophora columbiana

Green TuftGreen Tuft Clumping Under a Large Rock

Color: Green (Bright)
Shape: Carpet-like
Texture: Furry
Size: 2”
Zone: Upper Intertidal
Range: Alaska to Mexico

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Nori, Laver, Black Seaweed

Porphyra abbottae, Porphyra perforata and other similar species

Tufts of Nori at the Top of a Rock Covered with Sea LettuceNori and Other Seaweeds on a Rock in a Tide PoolDrying Nori on a Clothes LineNori

Color: Brown (Greenish, Purpleish or Nearly Black)
Shape: Sheet
Texture: Smooth
Size: Up to 1’
Zone: Intertidal
Range: Alaska to Mexico

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Rainbow-leaf, Splendid Iridescent Seaweed

Mazzaella splendens

Rainbow-LeafRainbow-Leaf in Flowing WaterPhoto Showing Iridescence of Rainbow-LeafExtreme Close Up of Rainbow-Leaf's Smooth SurfaceRainbow-Leaf's Rubbery Texture

Color: Red (Purpleish, Iridescent)
Shape: Sheet
Texture: Smooth
Size: Up to 3’+
Zone: Intertidal to Subtidal
Range: Alaska to Mexico

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Red Cellophane

Porphyra cuneiformis

Red Cellophane and Holdfast at Low TideTransparent Red CellophaneRed Cellophane

Color: Red
Shape: Sheet
Texture: Smooth (Silky)
Size: Up to 6”+
Zone: Intertidal to Subtidal
Range: Alaska to California

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Red Spaghetti

Gracilariopsis sjoestedtii

Red Spaghetti in the WaterRed Spaghetti Close UpRed Spaghetti with Green String Lettuce

Color: Red
Shape: Branching, Tube-like
Texture: Smooth
Size: Up to 3’
Zone: Intertidal
Range: British Columbia to Mexico

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Rockweed, Bladderwrack, Popweed

Fucus gardneri

Fucus Close UpFucus on RockStrip of Fucus Above a Strip of Sea LettuceMass of Fucus Covering a Large Area of RocksFucus

Color: Brown (Yellowish to Olive)
Shape: Branching, Pod-like
Texture: Bumpy
Size: Up to 2’
Zone: Intertidal
Range: Alaska to California

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Sarcodiotheca gaudichaudii

Sarcodiotheca gaudichaudii

Sarcodiotheca gaudichaudii at low tideSarcodiotheca gaudichaudiiSarcodiotheca gaudichaudii

Color: Red
Shape: Branched
Texture: Bumpy, Bushy
Size: Up to 1’+
Zone: Intertidal to Subtidal
Range: Alaska to Mexico

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Sargassum, Wireweed

Sargassum muticum

Large Mass of Sargassum in Tide PoolSargassum During Receding TideSargassum Covering the Beach

Color: Brown (Golden)
Shape: Branched (Profusely)
Texture: Bushy
Size: Up to 6’+
Zone: Intertidal to Subtidal
Range: Alaska to Mexico

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Sea Cauliflower

Lethesia difformis

Sea CauliflowerLeathesia Difformis

Color: Brown (Golden)
Shape: Pod-like
Texture: Bumpy
Size: Up to 6”
Zone: Intertidal
Range: Alaska to Mexico

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Sea Lettuce, Aosa, Green Laver

Ulva fenestrata, Ulva lactuca

Tufts of Nori at the Top of a Rock Covered with Sea LettuceSea Lettuce HolesSea Lettuce

Color: Green (Bright)
Shape: Sheet
Texture: Smooth, often with holes like Swiss-cheese
Size: 4–12”+
Zone: Intertidal
Range: Alaska to California (Ulva fenestrata), World-wide (Ulva lactuca and other species)

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Soda Straws, Whip Tube

Scytosiphon simplicissimus

Soda StrawsSmall Grouping of Soda Straws Growing on Large RockSoda Straws Close Up Showing SegmentingClump of Soda Straws

Color: Brown
Shape: Tube-like
Texture: Segmented
Size: Up to 2’
Zone: Intertidal
Range: Alaska to South America

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Split Kelp

Laminaria bongardiana

Split Kelp With Tattered EndsSplit Kelp Close UpSplit Kelp Detail

Color: Brown (Dark)
Shape: Blade
Texture: Smooth
Size: Up to 6’
Zone: Intertidal to Subtidal
Range: Alaska to California

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Studded Sea Balloons

Soranthera ulvoidea

Soranthera Ulvoidea (Studded Sea Balloons)Studded Sea Balloons

Color: Brown
Shape: Pod-like, hollow or filled with liquid
Texture: Bumpy
Size: 2–6”
Zone: Intertidal
Range: Alaska to California

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Sugar Kelp, Kombu, Sugar Wrack

Laminaria saccharina

Sugar Kelp Showing Holdfast and PuckersSugar Kelp on a Rock at Low TideSugar Kelp on the Beach with Sea LettuceSugar Kelp Close UpSugar Kelp

Color: Brown
Shape: Blade
Texture: Smooth with Puckers
Size: Up to 6′
Zone: Lower intertidal to subtidal, semi-protected areas, rocky areas
Range: Alaska, British Columbia, Oregon, California

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Turkish Towel

Chondracanthus exasperatus

Color: Red (Dark red to purple when young, red to yellow when older, can be iridescent when wet.)
Shape: Irregular Blade
Texture: Bumpy
Size: 12–32”
Zone: Low intertidal and subtidal
Range: Alaska to Mexico

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Turkish Washcloth

Mastocarpus papillatus

Turkish Washcloth on Rocky BeachTurkish WashclothTurkish Washcloth Close Up

Color: Brown (Yellowish, Reddish, Black when Dry)
Shape: Irregular Blade
Texture: Bumpy
Size: Up to 6”
Zone: Intertidal
Range: Alaska to Mexico

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Wakame, Strap Kelp, Winged Kelp, Honey Ware

Alaria marginata

Color: Brown (Carmel to Olive Green)
Shape: Blade
Texture: Smooth
Size: 2’–6’+
Zone: Low intertidal to subtidal
Range: Alaska, British Columbia, Washington, Oregon, California

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Witch’s Hair, Acid Kelp

Desmarestia aculeata

Color: Brown
Shape: Branched, Bushy
Texture: Smooth
Size: Up to 3’+
Zone: Low Intertidal to Subtidal
Range: Alaska to Oregon

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