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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.

Favorinus japonicus: feedng on dendronotid or aeolid egg mass
 
feeding on likely dendronotid or aeolid egg mass
 
shows animal feeding on likely dendronotid or aeolid egg mass (after previously feeding on Hexabranchus eggs)

Photos:  Karolle Wall: outside Ko'ie'ie Fishpond, Kalepolepo, Maui; Dec. 18, 2024.
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