if (mon->has_ench(ENCH_SUBMERGED))
                if(!mon->del_ench(ENCH_SUBMERGED))
                    // Couldn't unsubmerge.
                    mon->behaviour = BEH_LURK;

            if (mon->has_ench(ENCH_SUBMERGED)
                && !mon->del_ench(ENCH_SUBMERGED))
            {
                // Couldn't unsubmerge.
                mon->behaviour = BEH_LURK;
            }

        && menv[mon->foe].type == -1)

        && !menv[mon->foe].alive())

}                               // end handle_behaviour()

}