Southern CA early Spring Harmful Algal Bloom – First stranding February 21, 2025 (ongoing)

  HAB Outreach + Resources 

  • NEW! 2025 SoCal Paralytic Shellfish Poisoning (PSP) Data Flyer
    • SCCOOS has compiled PSP HAB data (observations of Alexandrium spp. and PSP toxins) in the Southern CA region from December to April 2025, including: weekly HABMAP sampling and CA Dept of Public Health data.
  • UPDATED 5/1: 2025 SoCal Domoic Acid (DA) Data Flyer
    • SCCOOS has compiled DA HAB data (observations of Pseudo-nitzschia spp. and domoic acid) in the Southern CA region from December to April 2025, including: weekly HABMAP sampling, continuous Imaging Flowcytobot (IFCB) data, CA Dept of Public Health data, and suspected domoic acid animal stranding reports from marine mammal rescue centers.
  • Updated 5/1: 2025 SoCal DA + PSP HAB Informational Flyer
    • SCCOOS is monitoring an ongoing DA + PSP Harmful Algal Bloom (HAB) in the Southern California region, and has developed a two-page informational poster to explain the science of HAB observing.