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Title: Mucous Envelope Formation in Two Species of Hawaiian Parrotfishes (Genus Scarus) 
Author: Byrne, John E
Date: 1970-10
Publisher: University of Hawai'i Press
Citation: Byrne JE. 1970. Mucous envelope formation in two species of Hawaiian parrotfishes (genus Scarus). Pac Sci 24(4): 490-493.
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.
ISSN: 0030-8870
URI: http://hdl.handle.net/10125/6131

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