Quiz #102: Seashore

Photo of Quiz #102: Seashore

Identify this washed ashore alga.  (Photographed on a southern Maine beach in November 2013.)

A. Bladder Wrack

B. Atlantic Dulse

C. Sea Colander

D. Atlantic Kombu

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A is incorrect. Bladder Wrack (Fucus vesiculosus) has branching, flat fronds, typically with numerous paired air bladders.

B is incorrect. Atlantic Dulse (Palmaria palmata) is a red alga who lacks perforations.

C is Correct! The name of this holey seaweed is Sea Colander (Agarum clathratum).

D is incorrect. Atlantic Kombu (Laminaria digitata) has a longer, thicker stalk which branches into separate finger-like blades.

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