The identification of these are uncertain and the photos likely show more than one species. Specimens would need to be examined to determine genus (or genera). These are usually hidden under rocks on lagoon and seaward reefs, and measure up to about 200mm.
One arm tip on this one is pure white. Perhaps it regenerated without the color.
Underside of the previous specimen.
Underside of the previous photo.
A rather small individual.
Possibly something different.
This blotchy one may be another species.
Updated 29 June 2021
Updated 10 February 2024