tetrapods

A coelacanth is a lobe-finned fish which is the group from which tetrapods, and thus humans, evolved.

On planet Floorp, carpets (organic bipedal tetrapods) use people (machines that suck air) to clean vacuums (woolen floor lining).

The same way dinosaurs, and hominids are both lobed-fin fishes (Sarcopterygii) as are all tetrapods.

But all mammals, including whales, are tetrapods and descended from an ancient lobe-finned fish.

It looks like there is a theory that dermal bone in early tetrapods was used this way, but it's still fairly speculative.

That is a fair point, and I know you could have listed even more examples than just tetrapods.

Lungfish are the closest relatives to tetrapods who likely evolved under similar conditions.

Many of the bizarre bone structures of beaked whales are not exposed like ‘visuals’ of terrestrial tetrapods, but are located deep in soft tissues.

If you really want to exclude tetrapods you might use rayed fish.

You're correct, the immediate ancestors of tetrapods almost certainly lived in freshwater, as known intermediate fossils like titaalik were found in fresh water stream deposits[1].

While among the living tetrapods only the varanids have such serrated teeth, in the past there have been many other animals with similar serrated teeth.

I believe all of the immediate ancestors of and early tetrapods have been found in fresh water deposits, although I can't confirm.

In common use, "fish" is, however a paraphyletic group which excludes tetrapods but otherwise includes all other osteichthyans.

"Fish", if taken as a monophyletic term, includes land mammals because tetrapods are osteichthyans -- bony fish.

Since starfishes don't include tetrapods, nor vice versa (nor do they share biological features to be in a polyphyletic grouping like "crabs"), the relevant common term is "Animalia" -- "animal".

Tetrapods have evolved powered flight perhaps 6 times, but life has only appeared once in the entire history of the earth.

Tetrapods (more properly terrestrial vertebrates, but to simplify things a little.