Well, they'll eat it that's for sure.
Personally I'm a bit skeptical of feeding Spectrum directly to coral as it contains trace amounts of Copper. Don't freak out, as we need to have a small amount of Copper in our systems (it's even in salt), and while feeding to our fish it will not create any harm whatsoever. Call me crazy but I just don't want to feed it directly to my coral. If they catch one or two, whatever, but I would personally not make it a staple in their diet - there are many other "meaty" pellet foods that can be used that do not contain Copper.