Algae that appear in oneiric thoughts may have very diverse interpretations. If they are collected or simply found, the subject is not acting sensibly, so you should reconsider your ways. When others are those who collect them, it means that some of your secrets will be made public by close people who want to harm you. Dreaming that you eat algae implies gathering forces to address adversity. If you only taste them, wasting them, there is the possibility that a business fails.