Chondracanthus exasperatus, commonly called Turkish towel, is a species of seaweed in the family Gigartinaceae. The specific epithet exasperatus (lit. 'roughened') refers to the bumpy texture of the blades (leaf-like structures). This texture also leads to the common name which evokes the luxurious feel of a towel from a Turkish bath. The rough, papillae-strewn blade surface even makes it difficult to measure the temperature using infrared thermometers.

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