snorkeling with school of sardines

acidification adventure animal aquatic area background baitfish beautiful biodiversity bycatch catch change clear climate conservation copy coral deep ecosystem environment fisherman fishing freediving fun global habitat herring illegal kingdom leisure marine massive natural nature overfishing pilchard pilchardus protected rayfinned reef sanctuary sardina sardines school scuba seascape shallow skindiving snorkeling space summer swarm travel tropical underwater vacation vortex warming water wildlife