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Costasiella kuroshimae Ichikawa, 1993
 
Costasiella kuroshimae: with egg masss
 
  with egg mass
shows older egg mass with patchy micro-algae on its surface

Photo:
  Kelly McCaffrey: found by Rebecca Bicker & Kelly McCaffrey; Maalaea Bay, Maui; July 26, 2021.

Costasiella kuroshimae: egg mass
 
  egg mass
shows older egg mass with urine-yellow pigment on the outer faces of its whorls (perhaps, due to concentration of colonizing micro-alga in that area?)

Photo:
  Kelly McCaffrey: found by Rebecca Bicker & Kelly McCaffrey; Maalaea Bay, Maui; July 19, 2021.

Costasiella kuroshimae: laying eggs?
 
  laying eggs

shows a relatively young, Costasiella kuroshimae on an egg mass surrounded by a mucous sheath (suggesting that it's in the process of laying)

Photo:
  Roney Rodrigues: west shore, Oahu; April 10, 2021.

Costasiella kuroshimae: more mature animal laying eggs
 
  more mature animal laying eggs

shows more mature animal laying eggs

Photo:
  Rebecca Bicker: Maalaea Bay, Maui; Aug. 26, 2021.

Costasiella kuroshimae: pair with several egg mass
 
  pair with several egg masses

shows a pair with several egg masses of varying age (six animals reported present on algal blade)

Photo:
  Rebecca Bicker: found by Rebecca Bicker & Kelly McCaffrey; Maalaea Bay, Maui; July 26, 2021.

Costasiella kuroshimae: egg mass overgrown by micro-algae
 

Costasiella kuroshimae: detail of micro-algae
 

egg mass overgrown by micro-algae
shows what appear to be yellow-green micro-algae colonizing the surface of an egg mass

Photos:
  Katherine Shepherd: Maalaea Bay, Maui; Oct. 17, 2021.
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