Flabellina, red and white nudibranch, calesthenic behavior, agility to hang by suction, underwater photography, travel photography, animal planet, underwater bio-diversity, portraits of the sea, amazing underwater photography, underwater nature, photojournalism, National Geographic, under the Blue Heron Bridge, Lake Worth Inlet, Riviera Beach, Florida, Palm Beach Photography, Tropical nudibranch, sea-scapes, sea slugs