Living specimens of Phymanthus pinnulatus, external morphology of oral end A expanded individual of green “banded” colour morph, in situ. Photograph by R Tan B an expanded slaty-green “plain” coloured individual, with extensive branching of its protuberances, in situ. Photograph by R Tan C a third colour morph with brilliant electric blue marginal tentacles, in situ. Photograph by NWL Yap D a partially contracted individual in situ, with its oral end protruding from the substratum; note longitudinal rows of verrucae along intermesenterial spaces, extending proximally from the oral end towards mid column, in situ. Photograph by R Tan.