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This was the only one of these I noticed the entire trip. When not "flashing", it looked just like all of the other flasher/fairy wrasses, but turned a beautiful purple (to the naked eye) with its nuptial displays.

All these shells were inhabited by (live) hermit crabs -- I saw them crawling around at higher tide -- but this observation is of the shell. The densities achieved was very surprising to me given how polluted the lagoon was.

Crawling up to the host Dendronephthya australis soft coral and attempting to squeeze through the polyps. What caught my eye is how long the foot can extend to give it a firm base to lean over.

Based on malacological differences and geographical location Prionovolva wilsoniana was previously thought to be a distinct species confined to a region from Japan to the south east coast of Australia, but Gary Rosenberg's (2010) study of the DNA has now shown this is the same species as Prionovolva brevis. Consequently Prionovolva wilsoniana is now synonymised with Prionovolva brevis. www.molluscabase.org/aphia.php?p=taxdetails&id=430583