Humans are animals, and we don't have an agreed upon definition of consciousness that would allow us to quantify it so precisely that we can be sure of the way you worded it. Many of the smarter animals may have just as much (but somewhat different) consciousness as humans, and you we can definitely come up with a reasonable definition of consciousness under which some animals may have more of it. For example, if one of the major measurable dimensions of consciousness involves spacial awareness (and it might, as it helps delimiting self from other) then cetaceans could easily have more of it.