Shape, size and colouration-The body is soft,elongated,worm-like,cylindrical and bilaterally symmetrical.It measures 10 to50 cm in length,accourding to species B.gigas attain a length of 1.8(Sawaya.1951) or 2.5(Spengel,1893). The colour is bright or drab with reddish or orange tints.
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