...which is why it is good that "fish" is not, in fact, defined
phylogenetically.
If it were defined as "Actinopterygii", that would be a good thing! People
might stop serving ray as "fish"...
Have you eaten ray wings? I have (when there was nothing better in the
university cafeteria here). Slimy and fibrous at the same time. It's
incredible. The monophyly of Osteichthyes becomes patently obvious this way.