Fellaster zelandiae
Fellaster zelandiae, which is also called a cake urchin, or the snapper biscuit, is an echinoderm of the family Arachnoididae, endemic to New Zealand. The maximum width of this type of echinoderm is 100 mm.
[Image:Arachnoides zelandiae (snapper biscuit) (underside).JPG|thumb|left|250px|Arachnoides zelandiae underside]