Since whales are teaming up with each other to take down yachts and teaching others how to do it I thought this would be a fun question.
If a majority of intelligent enough sea animals that could communicate with each other teamed up to mess with human activities in the sea who would win.
By the way for people that say that humans would obviously win we have already lost a war against emus before.
Considering the sheer amount of microplastics we are pouring in the ocean collectively, we may lose but after a while we are still going to bring them down with us.