I recently got curious as to which species of marine macroalgae I have observed so far in NYC. Here is an attempt at a list. Nearly everything is from Randall's Island; other species have their localities listed. Warning: some of these IDs are only guesswork:
GREEN ALGAE
Sea Lettuce -- Ulva latuca
Gut Weed -- Ulva intestinalis
Other Sea Lettuces -- Ulva spp
Bryopsis sp.
BROWN ALGAE
Rock Weed -- Fucus distichus
Bladder Wrack -- Fucus vesiculosus
Ribbon Weed -- Punctaria plantaginea [Soundview Park] but in Spring 2019 I found it at Randalls
?Ectocarpus siliculosus? -- or something similar-looking which grows attached to hard substrate.
RED ALGAE
Grinnell's Pink Leaf -- Grinnellia americana
Agard's Red Weed -- Agardiella subulata
Irish moss -- Chondrus crispus
False Irish moss, aka Turkish Washcloth -- Mastocarpus stellatus
Red Puff Balls -- Spermothamnion repens
Rusty Rock -- Hildenbrandia rubrum
Gracilaria ?vermiculata [this one from Fort Tilden]
Added in Jan 2019: Landlady's Wig -- Ahnfeltia plicata
I hope to add more to this list and/or refine it as I go along. Maybe I can add some nicer images too.
II assume that this is in the reproductive stage. I figure that why it has all those nodules over it.
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Wonderful! I love the common names of seaweeds too. :)
Thanks Sam. Yes some of the common names are really nice -- Grinnell's Pink Leaf is a good one.
Ah, in January 2019, @ginsengandsoon helped me find an additional species of red algae -- it was on the northern Harlem River beach on Randall's Island -- Landlady's Wig, aka Ahnfeltia plicata. I was pretty happy!
And now on Saturday April 27th 2019, during City Nature Challenge, I found Ribbon Weed on Randall's Island so I have amended that listing.
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