This volume presents state-of-the-art developments in theoretical and applied fluid mechanics. Chapters are based on lectures given at a workshop in the summer school "Stochastics in Fluids", held in Prague in August 2023. Readers will find a thorough analysis of current research topics, presented by leading experts in their respective fields. Specific topics covered include:Compressible Euler SystemNavier-Stokes equationsStochastic vortex methodsCompressible primitive equationsStochastics in Fluids will be a valuable resource for students interested in mathematical fluid mechanics.