| Flat-armed brittle star
agile but well camouflaged brittle star is sometimes commonly encountered
on our Northern shores, among seagrasses as well as on sand and silty
sand. Sometimes large numbers may be seen. It is more active at night
and can move about rapidly among seagrasses and over sand.
diameter less than 1cm, arms about 5cm long. Central disk flat and
smooth, some are circular, others have a distinct petal-like shape
with scalloped edges. Arms wide and flattened, with tapered pointed
tips. Spines short and flattened, along the sides of the arms. Long
tapered tube feet emerge from the arms. Colours usually match the
sand, often with a pattern of bars along the length of the arms. Usually
brown, beige or greenish.
The brittle stars on this page are probably from different species.
They are grouped together for convenience of display.
Upperside, some with scalloped edges.