Drs. Mark & Diane Littler are marine scientists who have developed a unique husband and wife collaborative relationship. Diane is a Adjunct Research Scientist, Harbor Branch Oceanographic Institute, Florida Atlantic University and a Research Associate at the Smithsonian Institution. Mark is a Senior Scientist at the Smithsonian Institution. Diane & Mark each have over 30 years of research experience on coral reefs, with more than 180 papers and books published in a wide range of disciplines ( publications).

The Littlers' current research focuses on relative dominance theory, functional morphology, and complex top-down vs. bottom-up interactions in coral-reef systems. Other active research includes: monographic, floristic, and phylogenetic systematics; seaweed experimental taxonomy; biodiversity, ecology, and conservation of tropical marine ecosystems.