Maria Byrne’s research on evolution of development is globally recognised for key discoveries on how animal body plans evolve, and has greatly enriched our understanding of Australia’s marine biodiversity. She uses life-history diversity in endemic species uniquely, to discover how developmental change drives speciation. She has advanced knowledge on the important marine phylum Echinodermata, culminating in a definitive textbook and monograph for Australia. She is also a recognised leader in global change biology, documenting the impacts of ocean acidification and warming on marine invertebrate life stages, revealing the adaptability of marine species that is key to understanding their future prospects.