Glenn Evans and Mark Nease are two divers/boat captains with extensive experience and knowledge about the marine ecosystem of the Florida Keys. Glenn Evans, a seasoned marine biologist, has spent a significant portion of his career studying the changes in the marine ecosystem, with a particular focus on water conditions such as clarity, algae blooms, and visibility. His work has contributed significantly to the understanding of the impact of environmental changes on marine life.

Grady Sullivan of Big Pine Key, Florida is a seasoned marine life collector and fisherman who has been a full-time resident of the Florida Keys for over two decades. His primary occupation involves collecting marine specimens for various purposes, including wholesale, retail, and for renowned marine life institutions such as SeaWorld and Miami Seaquarium. In addition to this, Sullivan also collects plants, mollusks, and live rocks for aquariums, showcasing a broad understanding and appreciation of marine life.

Herb Marvin is a native of Homestead, Florida, with deep familial ties to the region's commercial fishing industry. His personal history is interwoven with the environmental and industrial changes in Florida Bay. Marvin's upbringing in Homestead provided him with a unique perspective on the natural landscape and the community's reliance on its resources. His family's involvement in commercial fishing allowed him firsthand insight into the practices and challenges of the industry.

Narrator Jack Hill, of Key Largo, Florida, was the owner of a fish house and a former commercial fisherman at the time of the interview. Hill's formative years were spent mastering the craft of fishing, a skill passed down through generations. As he matured, he expanded his expertise beyond the immediate scope of fishing to encompass a broader understanding of market dynamics and trade.

Jim Thomas is a seasoned marine biologist and conservationist with a career spanning several decades in the field of marine ecology. His expertise lies in fisheries, marine life, and coral reef ecosystems. Thomas has dedicated his professional life to the study and preservation of marine environments, with a particular focus on the intricate relationships between different species and their habitats. He has been actively involved in research, conservation efforts, and advocacy, working closely with both scientific communities and government agencies.

Narrator Jimmy Albright of Islamorada, FL was a retired fishing guide at the time of the interview. He is the originator of the Albright Knot, a strong line-to-line connection used for attaching lines of different diameters. His career spans several decades, during which he has developed a deep understanding of the local marine environment and its inhabitants. Albright's work has placed him at the forefront of observing the ecological changes within this unique ecosystem.

Joan Nolan is a long-term resident of the Florida Keys with a deep connection to the local marine environment. Her life in the Keys has been characterized by her close relationship with the water, both professionally and recreationally. Joan has spent years observing and interacting with the marine ecosystem through her occupation, which remains unspecified, and her extensive involvement in volunteer work related to water conservation and marine life protection.

John Koenig is a long-time resident of the Florida Keys with extensive experience on the waters surrounding the archipelago. His life has been deeply intertwined with the marine environment, giving him a unique and personal perspective on the ecological changes that have occurred over the years. Koenig's firsthand knowledge comes from years of direct interaction with the marine ecosystem, particularly through fishing, which has been both a passion and a way of life for him.

Jonathan Roth is an esteemed environmental scientist with a focus on marine biology and a particular interest in the ecosystems of coastal regions. His career, spanning over three decades, has been marked by his dedication to studying and preserving the delicate balance of marine life in Florida Bay. Roth's expertise in the field is grounded in his extensive academic background, which includes a Ph.D. in Marine Ecology from a prestigious university.

Joyce Newman is a resident of the Florida Keys with a rich personal history intertwined with the environmental and cultural fabric of the region. She was an environmentalist and recreational fisher at the time of the interview. She is a former public school teacher and a knowledgeable figure regarding the local ecology and the socio-economic dynamics of the area. Newman's tenure in the Florida Keys has allowed her to witness firsthand the evolution of the environment, giving her insights into the subtle and overt changes that have occurred over time.