User-Friendly 'shiny' App for Bayesian Species Distribution Models R package glossa version 1.2.4 A user-friendly 'shiny' application for Bayesian machine learning analysis of marine species distributions. GLOSSA (Global Ocean Species Spatio-temporal Analysis) uses Bayesian Additive Regression Trees (BART; Chipman, George, and McCulloch (2010) <doi:10.1214/09-AOAS285>) to model species distributions with intuitive workflows for data upload, processing, model fitting, and result visualization. It supports presence-absence and presence-only data (with pseudo-absence generation), spatial thinning, cross-validation, and scenario-based projections. GLOSSA is designed to facilitate ecological research by providing easy-to-use tools for analyzing and visualizing marine species distributions across different spatial and temporal scales. Optionally, pseudo-absences can be generated within the environmental space using the external package 'flexsdm' (not on CRAN), which can be downloaded from <https://github.com/sjevelazco/flexsdm>; this functionality is used conditionally when available and all core features work without it. Software Depends: bs4Dash, R (>= 4.1.0), shiny Imports: automap, blockCV, dbarts, dplyr, DT, GeoThinneR, ggplot2, htmltools, leaflet, markdown, mcp, pROC, sf, shinyWidgets, sparkline, svglite, terra, tidyterra, waiter, zip Suggests: flexsdm, jsonlite, knitr, matrixStats, rmarkdown, testthat (>= 3.0.0), tidyr, tidyverse Jorge Mestre-Tomás <jorge.mestre.tomas@csic.es> Comprehensive R Archive Network (CRAN) Jorge Mestre-Tomás [aut, cre] (ORCID: <https://orcid.org/0000-0002-8983-3417>), Alba Fuster-Alonso [aut] (ORCID: <https://orcid.org/0000-0002-7283-291X>) GPL-3 2025-09-19 application/tgz https://CRAN.R-project.org/package=glossa doi:10.32614/CRAN.package.glossa en-US