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Favorinus japonicus
Baba, 1949
 
Favorinus japonicus: feeding
 
Favorinus japonicus: feeding, close-up
 
feeding
feeding on Hexabranchus sandwichensis eggs; also shows a spiral of F. japonicus eggs in center

Photos:  PF: Molokini Islet, Maui; May 21, 2008.

Favorinus japonicus: feeding, closeup
 
feeding, closeup
feeding on Hexabranchus sandwichensis eggs (showing Hexabranchus egg packets)

Photos:  Kelly McCaffrey: Maalaea Bay, Maui; Feb. 13, 2022.

Favorinus japonicus: yellow, on egg mass
 
complete egg mass with 6+ animals tucked among its folds


Favorinus japonicus: yellow
 
closeup of yellow pair on egg mass
feeding on a large dorid (or pleurobranchid/umbraculid?) egg mass

Photos:  CP: Kapalua Bay, Maui; Oct. 30, 2010.

Favorinus japonicus: on probable sacoglossid egg masses
 
feeding on probable sacoglossid egg masses

shows animal feeding on probable sacoglossid egg masses

Photos:  John Horn: Ahukini, Kauai; Aug. 18, 2022.

Favorinus japonicus: recent "immigrant"
 
recent "immigrant"

shows a white animal on a Hexabranchus egg mass that appears near hatching (illustrates movement between egg masses since the animal hasn't been on the pink mass long enough to change color--presumably, it matured feeding on white masses laid by other species)

Photos:  Shera Chee Mercer: Pupukea, Oahu; Aug. 21, 2022.

Favorinus japonicus: recent "immigrants" with "residents"
 
recent "immigrants" with "residents"

shows cluster of two white animals and three pink animals on a Hexabranchus egg mass that appears near hatching (illustrates movement between egg masses since the white animals haven't been on the pink mass long enough to change color); also shows age variation and variation of white spotting in pink animals

Photos:  Phil Peck: South Kohala, Big Island; Sept. 15, 2023.

Favorinus japonicus: recent feeding damage?
 
recent feeding damage?

shows an animal on a Hexabranchus egg mass with possible recent feeding damage (orange areas)

Photos:  Shera Chee Mercer: Pupukea, Oahu; Aug. 26, 2022.

Favorinus japonicus: feedng on white dorid egg mass
 
feeding on white dorid egg mass

shows animal on a medium-sized, white dorid egg mass

Photos:  Rebecca Bicker: Maliko Bay, Maui; Sept. 9, 2022.

Favorinus japonicus: feedng on yellow egg mass
 
feeding on likely Dendrodoris egg mass

 
shows a yellow animal on a likely Dendrodoris egg mass with its own egg mass in center, top

Photos:  Bruce Malasky: Pawai Bay, Big Island; Jan. 12, 2024.
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