A scuba diver swims through an underwater field of tape grass leading away from the Blue Springs cave in Merritts Mill Pond in Marianna, Florida.

blue spring state park florida marianna merritts mill pond adult at the bottom of blade of grass bottom bubble color image day diver ecosystem environment exploration flowing freshwater full length grass green growth horizontal lush foliage marine biology motion nature one person outdoors photography plant pond rear view reed river scuba divers scuba diving sea grass sea life seaweed shallow state park swimfins swimming tall grass tape grass underwater unrecognizable person vegetation water wetsuit