“The photo was taken during my field work of Ph.D research work on intertidal community structure. The captured moment shows high competition for space in two different invertebrate community- zoanthid (cnidarian) and Barnacle (arthropod). Zoanthid is colonial cnidarian found in intertidal zone to deep sea water while barnacles are sessile but these both animals are benthos and required space for settlement. The present picture indicates expansion of zoanthids around previously settled live barnacles and they almost covered some small ones. Now, juveniles of barnacles will not get the space for settlement and zoanthid polyps will continuing expand by budding and will covered and grown on all live barnacles.”