蘑菇水母钟状体搏动特写，伴有安达曼海的司机鱼

m jellyfish (Rhopilema hispidum) propels itself by rhythmic bell pulsation, contracting its dome to expel water and generate thrust, the frilled oral arm skirt and underside structure fully visible as reef bannerfish (Heniochus acuminatus) feed on it at close range. The sheltered cavity beneath the bell is known to provide temporary refuge for juvenile fish, adding a habitat function to an animal more often noted for its role as prey. Swimming mechanism and active predation are simultaneously resolved in this close frame. 4K, horizontal frame, close up, scuba diver POV. Andaman Sea, Krabi Province, Thailand.