Byssus

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Byssus

 

(1) An excretion of the byssal gland, found in the so-called feet of many bivalve mollusks. Immediately upon expulsion, byssus hardens and forms durable silky filaments by which mollusks fasten themselves to underwater objects. In antiquity a special cloth, vysson, was prepared from the byssus excreted by the large mollusk pinna.

(2) A roe disease of freshwater fish caused by certain fungi of the genera Saprolegnia and Achy la.

References in periodicals archive ?
In this study, a relatively low percentage of young oysters were found without byssi, and no oysters without byssi were found in the older group.
Given the results of this study, it is evident that longer and thicker byssus resulted from heavier oysters and when mature individuals continued to gain weight, byssi did not show continued augmentation in its diameter (Fig.