The journal publishes contributions from all of the disciplines of marine botany at all levels of biological organisation from subcellular to ecosystem. Subject areas are: marine algal and marine angiosperm systematics, floristics, biogeography, biochemistry, molecular biology, genetics, chemistry, industrial processes and utilisation; marine mycology and marine microbiology. Original knowledge is disseminated to provide synopses of global or interdisciplinary interest, and to stress aspects of utilisation. Applied science papers are especially welcome, when they illustrate the application of emerging conceptual issues or promote developing technologies. Checklists or equivalent manuscripts may be considered for publication only if they contribute new information on taxonomy (e.g., new combinations), ecology or biogeography of more than just local relevance. Checklists should be focused to highlight original information.