Florent's Guide To The

Tropical Reefs

Tryon's Risbecia
Hypselodoris tryoni
Tryon's Risbecia
Category: Dorid Nudibranchs
Scientific Name: Hypselodoris tryoni
Synonyms: Risbecia tryoni
Size: Up to 2.75 in. (7 cm)  
Depth: 10-100 ft. (3-30 m)
Distribution: West Pacific, Indonesia
Mollusca (Phylum)
└Gastropoda (Class)
 └Heterobranchia (Subclass)
  └Euthyneura (Infraclass)
   └Nudibranchia (Order)
    └Doridina (Suborder)
     └Chromodorididae (Family)
      └Hypselodoris (Genus)

Sea Slugs
Dorid Nudibranchs

Tryon's Risbecia

White's Hypselodoris

West Wind Hypselodoris

mari's Mexichromis

Bumpy Mexichromis

Tree-Lined Mexichromis

Miamira alleni

Sea-Purple Thorunna

Kahuna Nudibranch

White Ring Noumea

Lumpy Dendrodoris

Bifurcate Carminodori

Starry Carminodoris

Bohol Discodoris

Batangas Halgerda

Gold-Lace Nudibranch

Tessellated Halgerda

Fellow's Nudibranch

Funeral Jorunna

Red-Lined Jorunna

Spanish Dancer

Carlsonhoff's Phyllidia

Sky Blue Phyllidia

Elegant Phyllidia

Sea Blue Phyllidia

Ocellated Phyllidia

Painted Phyllidia

Polka Dot Phyllidia

Swollen Phyllidia

Granulated Phyllidiella

Liz's Phyllidiella

Phyllidiella nigra

Pimpled Phyllidiella

Pimpled Phyllidiella (Green Variation)

Rose Phyllidiella

Anne's Phyllidiopsis

Krempf's Phyllidiopsis

Shireen's Phyllidiopsis

Striped Phyllidiopsis

Mushroom Coral Reticulidia

Halgerda Reticulidia

Unadorned Gymnodoris

Gymnodoris subflava

Martadoris amakusana

Chamberlain's Nembrotha

Crested Nembrotha

Kubaryana's Nembrotha

Lined Nembrotha

Miller's Nembrotha

Nembrotha sp. 1

Nembrotha sp. 2

Spotted-Foot Plocamopherus

Striped Polycera

Slender Roboastra

Gloomy Tambja

Tambja sp. 1

Painted Thecacera

Black-Tipped Thecacera

Hairy Norse God

Banana Nudibranch

Gray Norse God Nudibranch

Ornamental Cadlinella

Heron Ardeadoris

Ardeadoris poliahu

Tom Smith's Nudibranch

Many-Lobed Ceratosoma

Alcala's Chromodoris

Anna's Chromodoris

Coleman's Chromodoris

Diana's Chromodoris

Elisabeth's Chromodoris

Loch's Chromodoris

Magnificent Chromodoris

Streaked Chromodoris

Willan's Chromodoris

Saffron Noumea

Dark Margin Glossodoris

Red-Tipped Sea Goddess

Purple-Spotted Sea Goddess

Harlequin Blue Doris

Felimida sphoni

White Mantle Glossodoris

Girdled Glossodoris

White-Margin Nudibranch

Gold and Purple Chromodoris

Co's Chromodoris

Creamy Chromodoris

Geometric Chromodoris

Bus Stop Chromodoris

Kunie's Chromodoris

Precious Chromodoris

Reticulated Chromodoris

Goniobranchus sp. 1

Goniobranchus sp. 2

Red-Tipped Nudibranch

Robe Hem Hypselodoris

Bullock's Hypselodoris

Decorated Hypselodoris

Hypselodoris iba

Colorful Hypselodoris

Katherina's Hypselodoris

Krakatoa Hypselodoris

Spotted Hypselodoris

Melanesian Hypselodoris

Paradise Hypselodoris

Beautiful Risbecia

Hypselodoris sp. 1



All Photographs
© 2025 Florent Charpin