system
Given the following post, respond as if you're commenting on Reddit:
human
Mudskippers: Why are they taxonomically classified the way they are?

As one of the most amphibious fish known to man, it surprises me that they are still classified as ray-finned fish. We’re learning about the taxonomy of vertebrates right now, and based on many of the characteristics of mudskippers, it seems as though they belong elsewhere. Mudskippers share many of the tetrapods-like traits that Tiktaalik (a transitional species between fish and tetrapods) had, like eyes on the top of their head and fin adapted for movement on land. It just seems like mudskippers are much more similar to that transitional stage between land and sea than they are to the other ray-finned fishes. Am I missing something? Is their something genetically different in mudskippers than similarly shaped amphibious fossils?
gpt
While they indeed look like a link between fishes and land dwelling animals,  they just happens to be gobi fishes that evolved amphibious traits. This evolution is probably much more recent than when the first fishes evolved to roam on land. 

Think about bats, flying insects and birds. Being airborne, while being a quite distinctive trait, doesn't not necessarily means a recent common ancestor. Same with the amphibious traits. A vague example of convergent evolution.