The animal weighs  and reaches up to  long excluding the long antennae, and is similar to P. delagoae, found off South Africa, from which it may be differentiated by a number of characters including the larger number of spines.
The animal has a weight and reaches up to  in length, not counting the long antennae, and is comparable to P. delagoae found in South Africa. It can be differentiated from P. delagoae by various features such as more numerous spines.