REEF Trip Leader Bios

Meet our REEF Trip leaders! All REEF trips are led by experts in their respective fields, providing you the unique opportunity to study and explore the marine world alongside industry legends. All REEF trip leaders are passionate and extremely knowledgeable. These renowned individuals are always eager to share their experiences and their love for the ocean with others, so here is your chance to learn from the best!

 Lad Akins | Scott and Patti Chandler | Andy DehartNed and Anna DeLoach | Carlos and Allison Estape | Tracey Griffin | Peter Hughes |
Paul Humann | Amy Lee | Janna Nichols | Christy Pattengill-Semmens and Brice Semmens | Ellie Splain

Lad Akins

Lad, REEF’s Director of Special Projects, is known as the leading expert on invasive species, specifically lionfish. He served as the Founding Executive Director of REEF and led the organization in that capacity for 16 years, helping to design and develop REEF’s widely recognized marine conservation programs. In 2005, he stepped down to focus his efforts solely on the lionfish invasion. A professional diver and Coast Guard Captain, Lad has successfully bridged the gap between science academia, management, commercial interests and the public. His broad perspective includes consulting numerous state, federal, and international boards, panels, and working groups on management of invasive lionfish. His current focus is on addressing the lionfish invasion including developing and implementing research, outreach, training, and control programs throughout the region. He has helped develop many of the lionfish control programs and practices throughout the invaded range.

Scott and Patti Chandler

Scott and Patti Chandler joined REEF in 1994 and have spent their time diving in the Caribbean. They are active underwater enthusiasts who love to share their joy of fish and creature watching with others. They have been presenting fish identification classes at different locations in the Caribbean for over 10 years. They have been part of the ReefNet family since 2000.

Scott recently retired from teaching high school but continues his love of sharing information by teaching fish identification in the caribbean. He is an underwater videographer and specializes in macro work, sometimes finding creatures that can’t be seen with the naked eye. He is one of the principle videographers for ReefNet’s 'Reef Fish Identification Interactive DVD, contributing photographs as well.

Patti is an Expert level REEF surveyor in the Tropical Western Atlantic. She is a member of the Golden Hamlet Club, having submitted over 1000 surveys. More than 100 of these surveys have logged over 100 species per dive. She is an accomplished underwater photographer, which is essential in confirming the id of unusual fish and critters.


Andy Dehart

Andy Dehart has been a REEF Board of Trustees member since 2007 and was an active member of the Advanced Assessment Team before that.  He has more than 20 years of experience in animal husbandry at several major public aquariums throughout North America.  As VP of Animal Husbandry at Frost Science in Miami, he oversees all animal care operations, aquatic life support operations, and wildlife rehabilitation programs and manages a talented animal care staff that are dedicated to the welfare of the animal collection.

Prior to joining the Patricia and Phillip Frost Museum of Science, Andy helped build and open the new Ripley’s Aquarium of Canada as the Director of Husbandry. This highly successful facility opened in Toronto at the base of the CN Tower in the fall of 2013.  Before moving to Canada he spent much of his career working for the National Aquarium in both their Baltimore and Washington, D.C. locations.  It was at the National Aquarium as a high school student selling tickets, that he realized animal husbandry was the perfect outlet for his lifelong passion for marine life.  Throughout his tenure there he worked in many capacities and left as Director of Fishes and Aquatic Invertebrates.  In addition, he was part of the opening team as an aquarist at the Kingdom of the Seas Aquarium at Omaha’s Henry Doorly Zoo in Omaha, Nebraska.

Andy’s knowledge of sharks has led him to serve as Shark Advisor for Discovery Channel, and has made a number of high-profile media appearances including The Today Show, The Early Show, NBC Nightly News, Larry King Live, Fox News, USA Today, The O’Reilly Factor and The Situation Room with Wolf Blitzer.  He has been featured in seven Shark Week productions for Discovery Channel.  


Ned and Anna DeLoach

Ned is a celebrated marine photographer who has made innumerable contributions to our understanding of the underwater world. Co-author of over nine marine life indentification books and co-founder of the Reef Environmental Education Foundation, Ned’s passion for the ocean seems to match his subject in one fundamental way: it knows no bounds.

Ned spent his early adult life working as a teacher in Jacksonville, FL, a facet of his life that is still regularly manifested in his work today. Ned has an undeniable gift for didacticism, which, in combination with his inexhaustible enthusiasm for the marine world and all its inhabitants, makes him a skilled trip leader who makes studying the ocean accessible to people of all ages.

Ned’s extensive work in his field is evident in his contributions to a variety of media. He founded New World Publications in 1972 and published his Diving Guide to Underwater Florida in 1979. In 1985, he assumed the post of editor-in-chief of Ocean Realm magazine. Ned has written and supplied photos for numerous other literary publications as well, including Alert Diver and Scuba Diving Magazine. He has also produced multiple underwater documentaries.

Anna is a talented videographer, underwater naturalist, computer scientist, and founder of the blog BlennyWatcher in 2011. She is a zealous traveler and a determined researcher, constantly striving to see even the most obscure species in their natural habitats. Anna is also a member of the Board of Trustees for REEF.

Just like her husband Ned, Anna has been a very active contributor to a number of popular literary magazines, having written for Alert Diver, Ocean Realm, and Scuba Diving Magazine, among others. In 2004, Anna produced the DVD Sensational Seas, which was hugely successful and led to a sequel.  The video she produced for REEF, REEF Fish Identification: A Beginning Course, won a Telly Award. National Geographic, the Discovery Channel, NOAA, and many other reputable organizations have utilized Anna’s exemplary work. In 2011, Anna was inducted into the Women Divers Hall of Fame.

Ned and Anna write a regular column entitled "Critter Hunt" for Scuba Diving Magazine. For the past seven years, the pair have been the resident naturalists at Buddy Dive resort in Bonaire teaching fish identification and behaviors.

Carlos and Allison Estape

Carlos and Allison Estape are Level 5 TWA REEF Fish ID Experts, members of REEF's Advanced Assessment Team, published underwater Photographers, fish id lecturers, and the creators of the 100 Fish ID website (, which provides tools to learn how to identify TWA fish species. They are passionate about diving, underwater photography, fish id & marine archaeology/history. Carlos and Allison are Islamorada residents who dedicate their time to being "citizen scientists" and greatly enjoy sharing their knowledge and enthusiasm for the underwater world with others. They frequently participate in REEF's research and data collection, for both the Volunteer Fish Survey Project and Invasive Lionfish Program. Carlos and Allison were chosen as REEF Volunteers of the Year in 2013.

Tracey Griffin

Tracey is a REEF fish expert who loves sharing her passion for marine life. A full time local resident of Cozumel, she has led the REEF Field Survey Trip there for many years. Under Tracey’s leadership the Cozumel Field Survey Trip has become one of REEF’s most popular trips, and the only destination we return to every year. Tracey has completed over 900 surveys, is part of the Advanced Assessment Team in the Tropical Western Atlantic region, and shares her fish identification expertise in REEF’s Fishinars. Over the years, she has participated and contributed to all of REEF’s projects including the volunteer Fish Survey Project, Grouper Moon Project, and Invasive Lionfish Project.

Peter Hughes

Peter is a member of REEF’s Board of Trustees. He is one of the diving world’s foremost scuba resort and liveaboard dive boat operators, having spent the past forty-eight years in the dive industry. In 2000 Peter received the Beneath the Sea “Diver of the Year Award” for environmental contributions and was inducted into the Beneath the Sea Diving Hall of Fame. Peter received the DEMA “Reaching Out Award” for his work in the live-aboard diving industry and was inducted into the DEMA Hall of Fame in 2011. In 2015 Peter was inducted into the prestigious International Scuba Diving Hall of Fame. Peter grew up in the Caribbean and has since witnessed the many changes occurring in the coral reefs. His observations and wealth of knowledge and experience make him an extremely adept REEF Field Trip leader.


Paul Humann

Paul is co-founder of the Reef Environmental Education Foundation and co-writer of ten fish identification field guides, is a celebrated scuba diver and an expert underwater photographer. Paul’s work has been featured in numerous magazines including Ocean Realm, Sport Diver, and National Geographicand he has been recognized as a leader in the study of fish. Paul’s detailed photographs have been key to positively identifying many species. In fact, many of his photos were the first ever documentation of living species in their natural habitats. What is more, Paul’s meticulous work observing, photographing, describing, and categorizing marine species has been incredibly impactful in expanding the general public’s knowledge base.

Paul started diving in the early 1960's. In 1970 he bought and captained the M/V Cayman Diver which is considered the Caribbean’s first successful live-aboard dive boat and thereby helped initiated the live-aboard diving trend that has since ballooned into a mainstream industry. In 1980 Paul moved back to the States to begin his career as an underwater photographer, author and book publisher. Paul has been frequently recognized for his work. He received DEMA’s Reaching Out Award in 2006, was inducted into the International Diving Hall of Fame the year after, and received the NOGI award in 2009.

Amy Lee

As REEF’s Trips Program Manager, Amy organizes, plans, and promotes trips to dive destinations throughout REEF’s nine survey regions, and is also in charge of marketing for the program. Managing REEF’s Field Survey Trips Program allows Amy to merge her passions for diving, communication, science and travel, while enabling individuals to immerse themselves in REEF’s numerous conservation projects. Her unique educational background in marine science and journalism makes her an excellent steward for the marine environment. A lifelong ocean lover and travel enthusiast, Amy has experience diving and conducting surveys throughout the Caribbean, Atlantic and Indo-Pacific. She is an expert level surveyor and member of REEF’s Advanced Assessment Team for the Tropical Western Atlantic region. Amy is based at REEF Headquarters in Key Largo, Florida, where she dives and surveys in her spare time.


Janna Nichols

Janna is REEF's Citizen Science Program Manager, working extensively with the Volunteer Fish Survey Project. She coordinates REEF's social media and was also the creator of the popular REEF Fishinar (webinar) program. Although Janna officially joined REEF staff in 2010, she has been conducting surveys, teaching Fish ID classes and giving REEF presentations as a volunteer since 2000, and is based in Vancouver, Washington. Janna is passionate about underwater photography and marine life identification, and many of her photos appear in west coast marine life ID guides, publications, and online resources. Her efforts were integral to the design and photography on REEF's many laminated fish identification cards. She has personally completed over 1,100 REEF surveys and is an expert level REEF surveyor in the Pacific Coast and Tropical Western Atlantic regions. Janna is a PADI certified SCUBA instructor (retired), a past AAUS Scientific Diver and DSO, and the leader of REEF's Pacific Coast Advanced Assessment Team. In 2003, she received REEF's Volunteer of the Year award, in 2013 she received Dive News Network's Diver of the Year Award, and in 2015 she received the Golden Hamlet award from REEF.

Christy Pattengill-Semmens and Brice Semmens

Christy Pattengill-Semmens, Ph.D., has been a member of the REEF family since 1993 and took up the post of REEF’s Director of Science in 1998. Her commitment to the Volunteer Fish Survey Project and precise data collection makes her an irreplaceable member of the organization. What is more, Christy has written for numerous notable publications including the Bulletin of Marine Science, the Marine Ecology Progress Series, and the Environmental Biology of Fishes. Christy is an authority on fish identification, having completed nearly 800 surveys in locations around the world. She is an expert-level REEF surveyor in all of REEF's program regions.

Brice Semmens, Ph.D., is an assistant professor at the Scripps Institution of Oceanography at UC San Diego. Brice’s ongoing research focuses on quantitative ecology. He also is the lead scientist on REEF's Grouper Moon Project. Like his wife Christy, Brice has a keen interest in data collection. He has also studied fisheries management, which gives him a unique perspective to share with those participating in the Volunteer Fish Survey Project. Brice has been a REEF member since 1993, has completed over 700 surveys, and is an Expert-level REEF surveyor in all of REEF's program areas.

Ellie Splain

Ellie serves as REEF’s Education Program Manager and is a passionate teacher of the marine environment. Ellie primarily focuses on education programs and efforts at REEF’s headquarters in Key Largo, Florida and outreach events including the annual REEF Fest. Under Ellie’s leadership, REEF’s education programs have grown to include the Ocean Explorers Camp, week long marine science programs for elementary and middle school students. Since her initial internship with REEF in 2013, Ellie has been captivated by the Volunteer Fish Survey Project, becoming an expert level surveyor and joining the Advanced Assessment Team for the Tropical Western Atlantic. Ellie is a divemaster and an experienced surveyor throughout the Caribbean.

Design by Joanne Kidd, development by Ben Weintraub