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Tryon's hypselodoris (Hypselodoris tryoni)

Photo of Tryon's hypselodoris (Hypselodoris tryoni)

Key facts

Scientific name
Hypselodoris tryoni
Common name
Tryon's hypselodoris
Category
Molluscs
Family
Chromodorididae
Genus
Hypselodoris
Size
5–10 cm
Depth
5–40 m
IUCN status
Least concern (LC)
Danger level
Harmless
Habitats
coral-reef
Behaviours
benthic, slow-mover
Ocean zones
Asian Pacific, Indian Ocean & Red Sea

Description

Hypselodoris tryoni reaches 10 cm. Large Indo-Pacific nudibranch (Chromodorididae) (formerly Risbecia tryoni) with cream-white mantle covered with distinctive large black spots and purple-blue edge, white gills, orange rhinophores. Remarkable behavior: pairs often move in trail-following file (one tactilely following another), characteristic of transitioned Risbecia/Hypselodoris. Lives from 5 to 40 m on coral reefs of central and western Indo-Pacific. Iconic macro photo subject in trail-following pair.

Frequently asked questions

How big is the Tryon's hypselodoris?
Tryon's hypselodoris (Hypselodoris tryoni) reaches 5–10 cm in length.
At what depth can you find the Tryon's hypselodoris?
Tryon's hypselodoris is found between 5–40 m deep.
Is the Tryon's hypselodoris dangerous to divers?
Danger level: Harmless.
What is the conservation status of the Tryon's hypselodoris?
IUCN status: Least concern (LC).
Where can you find the Tryon's hypselodoris?
Found in: Asian Pacific, Indian Ocean & Red Sea.

Other species in the genus Hypselodoris

  • Hypselodoris bullockii - Bullock's hypselodoris
  • Hypselodoris picta - Painted hypselodoris
  • Hypselodoris apolegma - Apolegma chromodoris
  • Hypselodoris emma - Emma's hypselodoris
  • Hypselodoris infucata - Painted hypselodoris
  • Hypselodoris maculosa - Spotted hypselodoris

Other species in the family Chromodorididae

  • Chromodoris magnifica - Magnificent chromodoris
  • Felimare tricolor - Tricolor doris
  • Chromodoris quadricolor - Pyjama slug
  • Felimida luteorosea - Rose-and-gold doris
  • Felimida purpurea - Purple doris
  • Goniobranchus reticulatus - Reticulated goniobranchus

Sources

  • Taxonomy: WoRMS (AphiaID 558646)
  • Photos: iNaturalist (CC BY-NC)
  • Distribution: GBIF (taxonKey 6126802)
  • Conservation: IUCN Red List
  • Encyclopedia: Wikipedia