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Favorinus
sp. #1
 
Favorinus sp. #1
Maximum size:  14 mm.

Identification:  This species is very similar to Favorinus japonicus. However, it has slenderer and smoother cerata that have violet subapical spots.

Natural history:  Favorinus sp. #1 is a moderately common species found in moderately exposed to exposed rocky habitats and Halimeda kanaloana beds at depths of 4-9 m (13-30 ft). Like F. japonicus, it feeds on the eggs of other opisthobranchs and we observed one feeding on a cephalaspidean egg mass that was laid in a holding dish. It lays a white, spiral egg mass composed of a narrow ribbon that hatches in about four days in the laboratory.

Distribution:  Maui.

Taxonomic notes:  There is some possibility that this species may turn out to be a color form of F. japonicus. It was first recorded in Hawaii from Airport Beach, Maui by CP on Sept 12, 1994.

Photo:  CP: 4 mm: Mala Wharf, Maui; May 2, 2006.

Observations and comments:

Note 1:  ( )
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