Dolphins and some whales can blow bubble rings. Here's a video clip of some dolphins blowing and playing with bubble rings for the shear fun of it. What a joy to watch. They have amazing control of them.
Who would want to harm such beautiful creatures? I am reminded of a part of the Jodo Shinshu "Golden Chain of Love" that reads, "I will try to be kind and gentle to every living thing and protect all who are weaker than myself." Namuamidabutsu.