If you're talking about corals like the one in my avatar, yes, you need to target feed them. And technically, you need to feed each head (from what I have been lead to believe, anyway). As AustinsDad suggested, coax them out and wait for their polyps to extend. Then target feed with a turkey baster or something like that. We generally shave off some frozen shrimp, mix it with mysis and then feed them that. They can actually handle some good size chunks (relative to their size that is).
They don't have high light requirements so a good flow, low light area is best. We tried putting ours under some rock, but that made it difficut to feed the back heads. We moved it up a bit and it's very very happy.
"Ladies and gentlemen of the jury, I apologize if my last remarks sounded condescending . . . that means when you talk down to people."
120g RR, 65g HOB
and 10g sump, 150g frag
tank, 100g sump. Highlights of live stock: Golden Moray eel, 2 purple tangs, 2 yellow tangs, 1 large copperband, 4 GSM's, dragon wrasse, barnacle blenny, 2 pajama cards, 3 green chromis and a dynamic assortment of soft & LPS