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Additional Photos
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live animal
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apex
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defensive fluid
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Volvatella vigourouxi (Montrouzier, 1861)
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Maximum size: 6.5 mm shell
length (Terry Gosliner, pers. com.).
Identification:
This species has a thin, largely transparent shell that narrows into a
spout posteriorly and has a medial constriction that varies in prominence. The animal is light orange,
flecked with darker orange and grayish white (the latter in spiral bands below the apex).
Natural history:
The few known
specimens of Volvatella
vigourouxi have been found in shallow water on Caulerpa
sp. Like Volvatella ventricosa, it releases a milky fluid when disturbed, presumably for defensive purposes. (Note 1)
Distribution:
Oahu: widely distributed in the Indo-Pacific.
Taxonomic notes:
This may be the animal listed in Kay, 1979 and Kay & Schoenberg-Dole, 1991 as Volvatella pyriformis.
Details of color and form appear to be a good match for the original
description of that species. If so, it was first reported from Hawaii in
Pease, 1868.
Photo: Terry
Gosliner: narcotized: Oahu.
Observations and comments:
Note
1: Thomas Irvine stated that his
animal "was initially found burrowing into some algae in a tidepool, but
when I pulled it out it began spewing white stuff (ink? viscera?)
before crawling away and burrowing back into some algae."
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