Feature article An extensive bloom of filamentous cyanobacteria in the Baltic Sea region in summer 2025Bengt Karlson, Lars Arneborg, Lars Axell, Mikael Hedblom, Anders Torstensson, Inga Kozsalka, Malin Olofsson, Malin Persson & Aida Zuberovic Muratovic (p. 1) HAB events and prediction An updated high-resolution, site-specific Karenia brevis bloom severity index and associated respiratory irritation impacting the southwest Florida coastYizhen Li, R Wayne Litaker, Richard Stumpf, Barbara Kirkpatrick, Katherine Hubbard & Katherine Kohler Harrison (p. 5) Seeing Blooms in a New Light: Digital Holography for HAB Monitoring in Lake ErieAhammad Abdullah, Aditya R Nayak, Timothy S Moore, Karl R. Bosse & Michael J Sayers (p. 10) Lingulaulax polyedra bloom in the Port of Tomis, RomaniaAndreea Cristina Gigică, Oana Vlas, Laura Boicenco & Bernd Krock (p. 12) The benthic dinoflagellate genus Prorocentrum in five countries of OceaniaTomohiro Nishimura, J. Sam Murray, Lesley L. Rhodes, Kirsty F. Smith, Lucy Thompson, Muharrem Balci, Michaela E. Larsson, Arjun Verma & Shauna A. Murray (p. 15) Harmful phytoplankton in Ciénaga Grande de Santa Marta: The Largest Lagoon-Delta Ecosystem in the Colombian CaribbeanJosé Ernesto Mancera Pineda & Edgar Arteaga Sogamoso (p. 18) HAB Training and networking International Symposium on Ciguatera Poisoning in the Pacific, hosted in Aotearoa New ZealandLaura Biessy, Kirsty F. Smith, Mireille Chinain, H. Taiana Darius & Clémence Gatti (p. 21) Sharing Italian Experience on Harmful Algae 2024/25 within BlueShellfish MCSA Staff Exchange 10108623Carmela Dell’Aversano, Chiara Melchiorre, Luciana Tartaglione, Michela Varra, Jorge Diogène & Mònica Campàs (p. 23) New international project and opportunities for students and ECRs Phycotoxins in the Arctic marine ecosystem: an emerging climate change risk (PHATE)Sofia Ribeiro & Audrey Limoges (p. 25) Interview Interview with Barrie DaleBarrie Dale & Kenneth Mertens (p. 27) Red Tides Archives Youssef Halim, the Creator of a “Celebrity”: AlexandriumRut Akselman (p. 34) In Memoriam Ruth AkselmanSilvia Méndez & Beatriz Reguera (p. 37) Beyond HAB Science Carved Wooden Models of MicroalgaeHaruyoshi Takayama (p. 39) Forthcoming ISSHA Corner with update on ICHA 2025 in October, Chile (p. 41) Mixoplankton session in AGU/ASLO February 2026 (p. 42) Dino13 conference in Bremen, Germany – 5 to 7 July 2026 (p. 42) International Conference on Molluscan Shellfish Safety (ICMSS) in Exeter, September 2026 (p. 43)