Gigantic algae infestation is creepy, yet beautiful

Swimming through an open cenote in Mexico is a beautiful experience. The crystal clear water provides an exceptional view of fish, rock formations, mangrove roots, and other plants. At the head of this inlet, water runs slowly and a gigantic algae bloom has grown. The algae has infested every surface, stretching out and flapping in the mild current in an eerie way. It gives the impression of a monstrous, slimy hand that reaches out to grasp a swimmer and pull them into the centre.
But despite it's obvious creepiness, the slimy appendages are also beautiful and graceful in their movements. These algae blooms grow longer until pieces break off and drift downstream with the current. Beauty is a matter of perspective in many cases.