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Additional Photos

underside

side

less white

ocelli detail

young, 5 mm

shell

egg mass
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GALLERY

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Bursatella cf. leachii
de Blainville, 1817

Maximum size: 22 mm.
Identification:
This
is a small, translucent-cream sea hare frosted with white and brown
flecks.
It's
decorated with prominent blue and gold ocelli at all sizes. Although
superficially similar to Stylocheilus striatus, it can
be distinguished from that species by its more prominent blue and gold
ocelli, more elaborate papillae and brown flecks that are random rather
than arranged in lines.
Natural history:
Bursatella cf. leachii is a moderately common
species found in moderately protected to highly exposed rocky habitats
from < 1 to 11 m (< 3 to 36 ft). It may also be found in Halimeda kanaloana beds. It feeds
on cyanobacteria (blue-green algae). As in S. striatus, the blue and gold
ocelli may represent aposematic coloration "advertising" the presence
of toxins concentrated from its food. It lays a tangled, golden-brown
egg string that hatches in six to seven days in the laboratory.
Distribution:
Big Island, Maui and Kauai: Bursatella
leachii
is
considered circumtropical. If the Hawaiian population turns out to be
different, it may also have a broader distribution in the Indo-Pacific.
Taxonomic notes:
Animals
in the Hawaiian population are much smaller and less
intricately papillate than populations of Bursatella leachii found elsewhere
in the Pacific (Note 1). It was first recorded
in Hawaii from Maliko Bay, Maui by PF.
Photo: CP: 16
mm: Ulua Beach, Maui; April 2, 2005.
Observations and comments:
Note
1: The largest of 70 animals from
algae washes
was only 22 mm in length and the few animals seen in the field weren't
noticeably larger. Also, an 11 mm animal laid eggs while held.
This supports the suggestion that the Hawaiian population may be
different from the much larger Indo-Pacific animals that can reach
150-200 mm in length.
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