Berthella martensi @ D -14m. Is. Chichi, Ogasawara, Japan.

Berthella martensi @ D -14m. Is. Chichi, Ogasawara, Japan.

Okenia hiroi @ D -9m. Is. Chichi, Ogasawara, Japan.

Okenia hiroi @ D -9m. Is. Chichi, Ogasawara, Japan.

Caliphylla sp. @ D -6m. Is. Chichi, Ogasawara, Japan.

Caliphylla sp. @ D -6m. Is. Chichi, Ogasawara, Japan.

Cyerce sp. @ D -6m. Is. Chichi, Ogasawara, Japan.

Cyerce sp. @ D -6m. Is. Chichi, Ogasawara, Japan.

Thecacera pacifica @ D -20m. Is. Ani, Ogasawara, Japan.

Thecacera pacifica @ D -20m. Is. Ani, Ogasawara, Japan.

Hypselodoris bullocki — mating @ D -8m. Is. Chichi, Ogasawara, Japan.

Hypselodoris bullocki — mating @ D -8m. Is. Chichi, Ogasawara, Japan.

Noumea angustolutea @ D -45m, TL 15mm. Osezaki, Izu, Japan.

Noumea angustolutea @ D -45m, TL 15mm. Osezaki, Izu, Japan.