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Paddle blade alga
Avrainvillea nigricans
Decaisne, 1842

The paddle blade alga has a dark brown-greenish, spongy, blade with a texture reminiscent of suede. The blade ends in a stem with a holdfast. It grows to about 15 cm high with blades about 6 to 8 cm wide and long. The plant body is coenocytic, i.e., the plant is multinucleate and nonseptate.

Common in shallow, sheltered waters.

South Florida, Bahamas and Caribbean.

It has several related species, with A. rawsonii at Curacao. Positive identification requires laboratory examination of the specimens.

Paddle blade alga (Avrainvillea nigricans)