Histological evidence for secretory bioluminescence from pectoral pockets of the American Pocket Shark (Mollisquama mississippiensis)

Claes, Julien M.; Delroisse, Jérôme; Grace, Mark A.; Doosey, Michael H.; Duchatelet, Laurent; Mallefet, Jérôme

doi:10.1038/s41598-020-75656-8

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Histological evidence for secretory bioluminescence from pectoral pockets of the American Pocket Shark (Mollisquama mississippiensis)

2020
By Claes, Julien M. ; Delroisse, Jérôme ; Grace, Mark A. ; ...
Source: Scientific Reports, 10(1)

[PDF-1.27 MB]

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Scientific Reports
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Claes, Julien M. ; Delroisse, Jérôme ; Grace, Mark A. ; Doosey, Michael H. ; Duchatelet, Laurent ; ... More +

Claes, Julien M. ; Delroisse, Jérôme ; Grace, Mark A. ; Doosey, Michael H. ; Duchatelet, Laurent ; Mallefet, Jérôme Less -
NOAA Program & Office:

NMFS (National Marine Fisheries Service) ; SEFSC (Southeast Fisheries Science Center)

NMFS (National Marine Fisheries Service) ; SEFSC (Southeast Fisheries Science Center) Less -
Description:

The function of pocket shark pectoral pockets has puzzled scientists over decades. Here, we show that the pockets of the American Pocket Shark (Mollisquama mississippiensis) contain a brightly fluorescent stratified cubic epithelium enclosed in a pigmented sheath and in close contact with the basal cartilage of the pectoral fins; cells of this epithelium display a centripetal gradient in size and a centrifuge gradient in fluorescence. These results strongly support the idea that pocket shark’s pockets are exocrine holocrine glands capable of discharging a bioluminescent fluid, potentially upon a given movement of the pectoral fin. Such capability has been reported in many other marine organisms and is typically used as a close-range defensive trick. In situ observations would be required to confirm this hypothesis.
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Bioluminescence Sharks
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Scientific Reports, 10(1)
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https://doi.org/10.1038/s41598-020-75656-8
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Journal Article
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urn:sha256:a71d85ffd2409544dd92c94d2918b81e0d24581cc198d2769f15cb7444d94095
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https://repository.library.noaa.gov/view/noaa/27366/noaa_27366_DS1.pdf
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Histological evidence for secretory bioluminescence from pectoral pockets of the American Pocket Shark (Mollisquama mississippiensis)

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