71431833 - Air shaft, (Puits aeriens) built to filter water from the air, Trans-en-Provence, Provence-Alpes-Côte d'Azur, France71431832 - Air shaft, (Puits aeriens) built to filter water from the air, Trans-en-Provence, Provence-Alpes-Côte d'Azur, France70218823 - Colonial sea squirt ( Didemnum). These are filter feeders taking in water through the large aperture and exhaling through the small perforations.