Linked from
The 30 pages that link to Harmful algal bloom, each with the reason it gives.
LakeRelated: Blooms can threaten lake wildlife, water supplies, and recreation.
BivalveRelated: Filter-feeding bivalves can accumulate algal toxins and transmit them through food.
MixotrophyRelated: Mixotrophic bloom-formers can combine photosynthesis with prey capture.
Pamlico SoundRelated: Some blooms in the sound can disrupt fisheries and create health risks.