Sea Lice: Pressure, Policy, and What Changed in 2025

Yes, it’s once again the time to discuss sea lice. In this episode, we take a clear-eyed look at what the last year of sea lice data is actually telling us (starting in Canada and ending in Norway) without the noise or wishful thinking. We unpack the implications of Canada’s latest court ruling in British Columbia, why the industry’s arguments around coexistence keep falling flat, and how Norway’s traffic light system continues to tighten around modeled lice exposure on wild salmon. Drawing on farm-level data, wild fish monitoring, treatment records, and temperature trends, this episode explains why 2025 became one of the most intensive treatment years on record, why that still wasn’t enough to reverse pressure, and what this means for regulation, capacity, and farm-level decision-making heading into the next cycle. For more aquaculture insights head to our Fish n’ Bits blog.