That's not correct. The need for buoyancy is a very similar constraint, just with a different threshold. If a blue whale is too heavy (or rather more accurately

That's not correct. The need for buoyancy is a very similar constraint, just with a different threshold. If a blue whale is too heavy (or rather more accurately, too dense), then it will become very challenging for the whale to surface to breathe. But I'm not sure why anyone would want to paint one?