Vertebrates with the word fish in them?

You're right to use the word "vertebrate" here, because it's a bit tricky! While we often talk about "fish" as a single category, it's actually a very broad term.

There are two main groups of fish, based on whether they have a bony skeleton or a cartilaginous skeleton:

1. Bony Fish (Osteichthyes): This is the largest group of vertebrates with the word "fish" in their name. Examples include:

* Goldfish

* Salmon

* Tuna

* Catfish

* Eel

2. Cartilaginous Fish (Chondrichthyes): These have skeletons made of cartilage instead of bone. Examples include:

* Shark

* Ray

* Skate

Beyond these, there are other aquatic vertebrates that are technically *not* fish, but still have "fish" in their name:

* Sea Horse - This is actually a bony fish, but its unique shape and behavior make it stand out.

* Lungfish - These ancient fish can breathe air, unlike most fish.

* Coelacanth - Also known as a "living fossil," this group of fish was thought to be extinct, but was rediscovered in the 20th century.

So, while there's a lot of variety within the "fish" category, they are all vertebrates, making them part of the animal kingdom!