yellow tangs will eat brine shrimp and other somewhat meaty items if available. just remember it is important to provide plenty of vegetable matter in addition to the brine shrimp, etc. seeing as how my yellow and regal tangs are complete PIGS, they not only eat nori and brine shrimp, but they will also eat mysis shrimp and chopped squid. i just try to feed them a variety of vitamin-enriched red, brown, and green marine algae
hope this helps