Halgerda willeyi

Halgerda willeyi is a species of sea slug. It is a dorid nudibranch, a shell-less marine gastropod mollusk in the family Discodorididae.^[2]

Halgerda willeyi
Scientific classification
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Gastropoda
Order:	Nudibranchia
Family:	Discodorididae
Genus:	Halgerda
Species:	H. willeyi
Binomial name
Halgerda willeyi Eliot, 1904[1]

Distribution

This species was described from a single specimen collected at Lifou, Loyalty Islands, by Dr A. Willey.^[1] Halgerda willeyi has been reported throughout the western Indo-Pacific, including Taiwan, Vietnam, Myanmar, Egypt, Indonesia, Malaysia and Australia and in the Red Sea.^[3][4][5]

Description

The body of the Halgerda willeyi is rigid, with a series of acute interconnecting ridges. The ridges are topped with a yellow or orange line. The grooves between the ridges have chocolate brown lines and these lines extend right to the edge of the mantle as numerous radiating lines. This species is a fairly large halgerdid,^[6] and can reach 50 mm.^[7]

• 
  Halgerda willeyi