May 19, 2020 · If you must find a substitute for branzino, look for a fish that is similarly white, lean, and flaky. Perfectly acceptable options include: Atlantic croaker, black sea bass, flounder, rainbow smelt, red snapper, tilapia, rainbow trout, weakfish (sea trout), and whiting. Where to Buy Branzino in the U.S. Branzino at market Getty 5/19/20. Credit