Mucous Envelope Formation in Two Species of Hawaiian Parrotfishes (Genus Scarus)

Date
1970-10
Authors
Byrne, John E.
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Volume Title
Publisher
University of Hawai'i Press
Abstract
Some parrotfishes have developed a unique capacity to form a mucous envelope at night. Scarus dubius and S. perspicillatus are two Hawaiian species that exhibit envelope-building behavior. Laboratory experiments indicate that envelope formation is promoted by darkness, and is inhibited by constant light. The completed envelope is a transparent, mucous cocoon surrounding the fish. A mass of glandular tissue was found in the buccal cavity of S. dubius and S. perspicillatuS. It is suggested that this tissue is the envelope-producing gland.
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Citation
Byrne JE. 1970. Mucous envelope formation in two species of Hawaiian parrotfishes (genus Scarus). Pac Sci 24(4): 490-493.
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