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As for using an extension pole to place a very small camera closer to animals or in tight spaces, that is far less intrusive than swimming up to them in full gear, blowing bubbles, with a huge rig, which is almost guaranteed to scare off the animal. It is amazing what a difference 6 feet of space makes, when the huge, bulky, loud, bubbling object is that far away and the only thing close to the animal is a 2 inch by 2 inch box. This absolutely gives the ability to get different and dramatic close perspectives without disturbance. Like anything else, if it appears that placing the camera in this way disturbs the subject, then back it off, which applies to all photographers.
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