Source: /cirosantilli/fish

= Fish
{tag=Paraphyletic subgroup}
{wiki}

<Vertebrates> minus <tetrapods>.

This paraphyletic subgroup is easy to form the "acquatic only" (fishes) vs "things that come out of water" (<tetrapods>). Though <mudfish> make that distinction harder.

Which kind of makes sense, why would you want for limbs unless you are going to stay out of water!