http://www.flickr.com/photos/healthebay/4853394389/sizes/z/in/photostream/

http://farm3.static.flickr.com/2633/4025161824_71822c948e_z.jpg

http://www.flickr.com/photos/torvaanser/1258490531/sizes/m/in/photostream/

http://farm4.static.flickr.com/3373/3576290190_c676bc29df.jpg

http://farm1.static.flickr.com/164/437287338_2eac9f5da5.jpg

www.johnharveyphoto.com

Red Algae Green Algae

Brown Algae

http://farm6.static.flickr.com/5234/5808279714_dd12cb8c14_z.jpg

http://farm4.static.flickr.com/3399/5808280290_cfd6e0e42e_z.jpg

Lots of branches or blades

No branches, flat or sack-like

bright green and very thin

Sack-like, filled with water

Pink and white with branches

Not pink or red

Dark or black

Green or brown

Sea Lettuce

Pink Coralline Algae

No gas-filled floats

With many gas-filled floats

Winged Kelp

Feather Boa Kelp

Branching at tipsRockweed

Black Pine

Sea Sacks

START

Bumpy Turkish Washcloth

Small and bristly

one blade attached to holdfast

Flat thin blade

Dark red

smoothIridescent Seaweed