Lesson, 1830
H. (Thymiosycia) hilla is a light to dark brown sea cucumber with prominent pale papillae. It is a small to medium, cylindrical and tapering species. It is thin and soft, with a loose tegument (H. hilla photo[/l]). [l][m]Glossary[/m][r]Spicule[/r]Spicules are rather open tables, and buttons with big holes. H. hilla may be found on reefs, below rocks of the reef flat.
Remarks: Colour and pattern serve to distinguish Holothuria (Thymiosycia) species when alive. H. impatiens is very variable but much rougher than the rather soft hilla with which it could be confused. H. hilla is rather soft compared with the very variable and much rougher H. impatiens, with which it could be confused.