If we lose the ability in question for a single moment only, we are immediately being hijacked by an aggressive little "Think me!" and our mind begins to wander.

Consciousness is phenomenologically subjective whenever there is a stable, consciously experienced first-person perspective.

Subjectivity is an ability, the capacity to use a new inner mode of presenting the fact that you currently know something to yourself.

As a first-order approximation, I would say that phenomenality is "availability for introspective attention": Consciousness is a property of all those mental contents to which you can in principle direct your attention.

Dolphins frequently leap above the water surface. One reason for this behaviour could be that, when travelling longer distances, jumping can save the dolphins energy as there is less friction while in the air.

Speaking as a phenomenologist, it seems to me that a considerable portion of mind wandering actually is "mental avoidance behaviour", an attempt to cope with adverse internal stimuli or to protect oneself from a deeper processing of information that threatens self-esteem.

The Ego is a transparent mental image: You, the physical person as a whole, look right through it. You do not see it. But you see with it.