From the following statements select the wrong one:

Explanation

Prawns have two pairs of antennae, one on either side, just below the antennules. They are sensory, excretory, and balancing in function. Antennules are attached on either side, below the bases of the eye stalks. They are tactile in function. Nematocysts are present in cnidoblasts and act as organs of offence and defence. Millipedes belong to the class Myriapoda. They are called thousand-leggers because they possess numerous walking legs. Their body is made up of a small head and 40 trunk segments, each with two pairs of jointed legs. Animals belonging to the phylum Porifera are mostly marine, while a few are freshwater.