The article for the Brinewing has it classified as aggressive, which is something I don't entirely agree with. In my experience they only freeze you if you stay near them for a significant duration, and they always prioritize smaller fish. In addition, their projectiles don't actually deal any damage, meaning the only danger they present is the potential to prevent you from reaching the surface to regenerate lost oxygen. The Lily Paddler has similarly harmless but potentially debilitating behaviour and is categorized as Defensive. I would love to hear your opinion however!