I can help here-
Just got my Antenneta 2 weeks ago. It likely won't eat the first 5-7 days once you get him into your tank. I tried krill right off the bat and he had no interest. So after 3-4 days, I went and got some FW mollies (that if you acclimate, can live in your SW tank. Perfect !!) and some ghost shrimp. He ate the 3 ghost shrimp right off the bat, and had no interest in the mollies.
So this past Tuesday I noticed only 1 mollie left....then Wednesday there were no mollies left. Assuming he ate them, thats the route i'm going until I can switch him over to frozens.
I've been using fish line with a small knot on the end to keep the krill/SS from falling off. I dangle the fish line from a chopstick that is outside the water. He seems to get spooked and hides whenever I place it into the water. He seems interested in it, but hasn't bit yet.
Don't be frustrated after the first week, he'll be shy and won't come out alot. But they are beautiful fish !!