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Additional Photos

crawling

underside

egg mass
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GALLERY

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Noumea sp. #4

Maximum size: 21 mm.
Identification:
This
species
has
a
cream-white
body that is typically pale peach
medially, more so as the animal grows in size. An
opaque white stripe in the center of the notum is almost always
continuous and a magenta line
encircles the mantle inside the white mantle margin. The rhinophore
lamellae are orange, becoming red-orange near the tips, and the gills
are
translucent with orange on the outer edges. It can be distinguished
from Noumea
varians by its
unbroken white mid-dorsal line and its orange-tipped rhinophores and
gills.
Natural history:
Noumea sp. #4 is a
moderately rare species typically found on rocky bottoms, either in the
open or on shaded walls, at depths of 3-26 m
(10-85 ft). It occurs at moderately exposed to highly exposed sites
and
appears to feed on a dark gray sponge that is often difficult to see
due to other invertebrate growth. On a few occasions several animals
have
been observed on a host sponge for over two months, frequently huddled
next to each other. The spiral egg mass is white and a 13 mm animal
laid a 6 mm diameter mass that hatched in about seven days in the
laboratory.
Distribution:
Big Island, Maui, Oahu and French Frigate Shoals.
Taxonomic notes:
This
species
was
listed
as
Thorunna
gloriosa (Bergh, 1874) in Bertsch and Johnson, 1981 (top photo)
and was first recorded in Hawaii from Pupukea, Oahu by Scott Johnson on
March 22, 1978.
Photo: John,
Mike & Dan
Cesere: 17 mm; resting pair: Molokini Islet, Maui; July 24, 2008.
Observations and comments:
Note
1: ( )
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