@CoolBlenderKitten @wonderofscience, It is not intelligence that has led to the destruction of our environment, but our technology in combination with our stupidity and greed.
An aquatic animal will never be able to develop a destructive technology like ours, regardless of how intelligent it becomes, because the basis of all our technology is the domination of fire, impossible for an aquatic animal. Delphines and Orcas do not differ much from us in terms of intelligence.