The pair of superomarginal spines between the arms is often longer than the other.

There are a pair of short, upward-facing spines on the waist.

There is also a pair of curved spines at the base of each leaf.

It has four pairs of spines which are small but sharp.

At the anterior end are three pairs of spines.

Each of the next six tentacles lies directly above a pair of spines.

The last pair of spines has no corresponding tentacle above.

The back of the thorax has three pairs of spines.

A pair of small spines at the outer rear corners is present.

Both have three to seven pairs of spines near the base of the gills.