New Scientist, a popular science magazine, published an article entitled, “Most fish in the sea evolved on land.” It doesn’t describe anything new and exciting, except bad science journalism. If you read the title, you’d think “wow, fish evolved on land.” Well, they didn’t, and the article makes that clear. The article states that fish evolved in freshwater and radiate out to saltwater environments, mainly because freshwater environments are more stable, at least, with regards to the water.
The article is somewhat compelling because freshwater environments might be the genetic reservoir for fish during massive ecological changes, even mass extinctions. But other than that, no, fish did not walk on land before evolving into fish. It’s bad science journalism to create an article title that is so totally misleading.