Len Zell Len Zell is one of the world's foremost authorities on the Great Barrier Reef. He is a prolific writer, illustrator and photographer and has published more than 10 books. He is highly sought-after as a field guide for his extnsive knowledge, and his contributions to marine science have been acknowledged by having two species of coral named after him. He has also appeared on several different documentary television shows. Len is currently an adjunct Senior Lecturer in Marine and Tropical Biology at James Cook University in Queensland, and also appears at many other universities as a guest lecturer. Read More Read Less