All Sea Slug & Nudibranch Species 317

Costasiella sp. 3

Costasiella sp. 5

Costasiella sp. 6

Costasiella sp. 7

Costasiella sp. 8

Costasiella usagi

M. Ichikawa, 1993

Costasiella vegae

M. Ichikawa, 1993

Aplysiopsis orientalis

(Baba, 1949)

Aplysiopsis sp. 1

Aplysiopsis toyamana

(Baba, 1959)

Hermaea wrangeliae

(M. Ichikawa, 1993)

Caliphylla sp. 1

Cyerce bourbonica

Yonow, 2012

Cyerce goodheartae

K. Moreno, Gosliner, N. G. Wilson, Krug & Á. Valdés, 2025

Cyerce kikutarobabai

Hamatani, 1976

Cyerce trowbridgeae

K. Moreno, Gosliner, N. G. Wilson, Krug & Á. Valdés, 2025

Mourgona osumi

Hamatani, 1994

Mourgona sp. 1

Mourgona sp. 2

Mourgona sp. 3

Mourgona sp. 4

Polybranchia orientalis

(Kelaart, 1858)

Polybranchia samanthae

Medrano, Krug, Gosliner, Biju Kumar & Á. Valdés, 2018

Polybranchia spp.

Sohgenia palauensis

Hamatani, 1991

Sohgenia sp. 1

Alderia modesta

(Loven, 1844)

Alderiopsis nigra

(Baba, 1937)

Placida babai

Ev. Marcus, 1982

Placida daguilarensis

K. Jensen, 1990