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Eubranchus
sp. #4
 
Eubranchus sp. #4
Maximum size:  4.2 mm.

Identification:  This species has a translucent-white body sprinkled with orange-brown flecks and patches. The long, slightly lumpy cerata have white acid glands at their tips and the cream digestive gland is visible within them. The rhinophores and cephalic tentacles are smooth and translucent-white with subapical translucent-orange bands. White patches and bands may be variably developed on the notum, cerata and rhinophores (perhaps, increasing with age?).

Natural history:  Eubranchus sp. #4 is known from two animals found in the 1990s and several found in spring, 2022 on Halimeda at depths of 3-27 m (11-90 ft). The more recent animals were apparently feeding on an epiphytic hydroid of the genus Sertularia. It probably lays lozenge-shapped, white egg masses.

Distribution:  Maui: may also be known from Heron Island.

Taxonomic notes:  It was first recorded in Hawaii from Makena, Maui by PF on June 7, 1995. Animals with more white pigment were formerly listed as Eubranchus sp. #7.

Photo:  PF: 4 mm: Makena, Maui; June 7, 1995.

Observations and comments:

Note 1:  ( )
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