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This species has been observed on Reunion, Mauritius, Mayotte, Madagascar and Seychelles Islands

Order : Nudibranchia Suborder : Euctenidiacea Superfamily : Doridoidea Family : Chromodorididae Distribution : Tropical western Pacific and eastern Indian Ocean. Maximal size : 40 mm Abundance : Frequently on the fore reef zone Species characteristics : There is usually a thin opaque white line at the mantle border. It ranges in colour from a pale straw, or even white background to a deep purplish pink. Typically, the gills and rhinophores are yellow or orange with a basal pink or purplish band.
	Showing species characteristics...	Photo Florence Trentin Reunion, Saint-Leu. Size : 25 to 30 mm

See more about : Sightening and mating periods

See more about : Hypselodoris bullockii variability in Southwest Indian ocean

Remarks :

Synonymous : (according Worms)
          - Chromodoris bullockii, Collingwood, 1881
          - Risbecia bullockii, (Collingwood, 1881)

Bibliographic data :

Originally described from the South China Sea, this species is found in the western Pacific as far south as southern Queensland. It is also found in north western Australia and Thailand.
    Hyspelodoris bullocki coloring is highly variable around the world (see website for Bill Rudman to see this biodiversity) but in Reunion, Mauritius and Mayotte all specimens seen have the same characteristics : a body blue or pink pretty pale, gills and rhinophores are yellow or orange with a basal pink or purplish band. The coloration of the Seychelles specimen is similar but the coloration of the notum and foot is paler. The rhinophores of Madagascar specimen very dark...
    The egg mass (yellow ribbon) is made up of thousands of individual eggs, giving a speckled appearance
    It feeds on an unidentified species of Dysidea.

References :

Bill Rudman Sea slug site : Sea Slug Forum : Hypselodoris bullocki
   Nudipixel Hypselodoris bullockii

Publications :

Johnson R.F. & Gosliner T.M. (2012) Traditional taxonomic groupings mask evolutionary history: A molecular phylogeny and new classification of the chromodorid nudibranchs. PLoS ONE 7(4): e33479
    Collingwood, C. (1881) On some new species of nudibranchiate mollusca from the eastern seas. Transactions of the Linnean Society of London, Zoology, 2 : 123-140.

Other photos of Hypselodoris bullockii :

Florence Trentin Reunion, "Ali baba" at Saint Leu, 17 m, 2 October 2005

Sébastien Flouvat   Reunion, "Maharani " at Boucan Canot, 10 m, 2 Jully 2007   Gills partially retracted

Cédric Péneau   Reunion, "Canyon" at Saint Gilles, 10 m, 11 July 2008   The egg mass (yellow ribbon) is made up of thousands of individual eggs, giving a speckled appearance

Christophe Mason-Parker Seychelles, Harrisons Rock, Mahè, 16 m, 23 December 2010   The coloration of the Seychelles specimen is similar but the coloration of the notum and foot is paler

Alain barrére   Madagascar, Andavadoaka   The rhinophores of Madagascar specimen are very dark...

See more about : Hypselodoris bullockii variability in Southwest Indian ocean

Reunion, mating between two Hypselodoris bullocki, at Saint Leu, by Erwan Meyer

Reunion, H. bullocki et Glossodoris atromarginata, at Saint Leu, by Erwan Meyer

Mauritius Island, Hypselodoris bullocki laying eggs, at Corsaire Wall, by Mathieu Bayon

Reunion, Hypselodoris bullocki, a strange mating at Saint Gilles, by Sophie Darnis

Reunion, Hypselodoris bullocki standing up, at Saint Leu, by Raphaël Roland Gosselin

Reunion, Hypselodoris bullocki and the Tridacna, at Saint Paul, by Thierry Peres  

Mayotte, Hypselodoris bullocki, at Passe en S, by Yvon Gildas 

Reunion, Hypselodoris bullocki raises its head, at Saint Paul, by Cédric Péneau  

Reunion, 3 mating in a small population of Hypselodoris bullocki, at Etang salé, by Cédric Péneau