space invader pectinia polyp on frag plug, reef marine aquarium ecosystem, caribbean sand bottom live rock aqua

pectinia alcicornis merulinidae pectiniidae chalice coral spiny cup antler indopacific plankton feeder photosynthetic zooxanthellae large polyp stony lps encrusting cabbagelike aggressive sweeper tentacle sting branch shape current stone captivity aquatic biodiversity fauna environment underwater propagation lateral widespread salt saltwater aquadesign aquascape hardscape reef tank aquaculture colorful tropical coralimorph decorative exotic macro controlled conditions pet shop space shallow dof glass refraction selective focus solitary invader frag plug marine aquarium ecosystem caribbean sand live rock circular flow fluorescent led light