Actuopalaeontology is a modern discipline in geosciences. Keeping in mind that physical processes (e.g. hydrodynamics, sediment transport, climate, etc.) and biologic and ecologic processes (e.g. inter- and intraspecific interaction, metabolism, behaviour) in the past must have been similar to those occurring in our current environment, the actualistic approach is an essential field of research in the geosciences. The results of actualistic studies allow detailed but critical reconstructions in palaeoecology, palaeogeography and of the palaeoenvironment.