Salmacis sphaeroides (Linnaeus, 1758)
Uncommon in the Solitary Islands Marine Park. Distributed throughout the tropical Indo-Pacific region.
Frequents subtidal areas of algal growth and detritus, to a maximum depth of 90m.
Distinguished by the brown/green test with banded spines. May collect detritus from the substrate which is used for camouflage. Grows to around 8cm.