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Chromodoris
sp. #1

 
Chromodoris sp. #1
Maximum size:  50 mm (Kay & Young, 1969).

Identification:  This is a broad, flattened species with a white notum densely reticulated in red, a yellow marginal band, yellow rhinophores and orange-lined gills. The notum is decorated by a series of enlarged, dome-shaped pustules with violet-red tips. The latter feature distinguishes it from the similar appearing Chromodoris petechialis and Chromodoris sp. #5.

Natural history:  Chromodoris sp. #1 is commonly seen in moderately protected to exposed rocky habitats at depths of 6-60 m (20-197 ft). It is nocturnally active but may also be found under rocks, crawling on sand, or resting in the open on shaded cliffs during the day. Scott Johnson reports it apparently feeding on a white sponge. It lays a light peach egg mass.

Distribution:  Big Island, Maui, Molokai, Oahu, Kauai and Niihau: widely distributed in the Indo-Pacific.

Taxonomic notes:  Although labeled in various sources on-line as a form of Chromodoris tinctoria, this appears to be a distinct species based on the enlarged hemispherical pustules on the notum, its solid-yellow rhinophores and its nocturnal habits. It is listed as C. petachialis in Bertsch and Johnson, 1981 and Kay, 1979. It is referred to as the "red-spotted nudibranch" in Hoover, 1998 & 2006 and was probably first reported in Hawaii from Ala Moana, Oahu in Dec., 1961 (Kay & Young, 1969--as C. petechialis).

Photo:  PF: Makena, Maui; 2007.

Observations and comments:

Note 1:  ( )
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