Hexabranchus pulchellus Pease, 1860
|Photo: Mike Severns: Aug. 1988.
|shows egg packets embedded in ribbon shortly after laying
Photo: Kelly McCaffrey: Maalaea Bay, Maui; Feb. 13, 2022.
egg mass laid on highest available point
|Photo: PF: Molokini Islet; May 13,
laying eggs, detail
completed egg mass
|shows large animal laying eggs at night; completed mass photographed the following day
Photo: Pam Madden: about 200 mm: Ho'okena, Big Island; Dec. 19 & 20, 2021.
hatching egg mass
|shows egg packets breaking up to release larvae; Favorinus japonicus
also present (top, right with egg mass in 1st photo; center, left in
2nd photo): Although there's some uncertainty whether the mass belongs
to this species or H. aureomarginatus, the width of the ribbon in the 1st photo and Shera's comments on populations at the location support H. pulchellus.
Photos: Shera Chee Mercer: North Shore, Oahu; July 14, 2022.
egg mass with algae, side
egg mass with algae, top
egg mass with algae, detail
|shows egg mass colonized by micro-algae; There's some uncertainty in assigning this mass to H. pulchellus (John reports that most Hexabranchus in the area are H. aureomarginatus). However, the height of the ribbon is more typical of H. pulchellus masses. Also, note the Favorinus japonicus egg mass in the "top" photo (white spiral).
Photo: John Horn: Ahukini Pier, Kauai; Sept. 19, 2022.