Whats the Best way of feeding a Dragon Goby??

Frozen bloodworms or brine shrimp. Place them near the goby so he can easily find them. He will sift through and start sucking them down.

well if you have a sediment substrate put the food in it and it will filter through it. You can do the above or you could target feed it.

Sometimes he will open his mouth and swim the top water, so I just put flake in his path and he eats....Other times when I put sinking pellets near him he gets them pretty quickly....The have awsome sense of smell, when I drop clams or shrimp he will come out of his cave and start moving his mouth to imitate feeeding....He eats very well nice fat belly after each feeding...

i defrost bloodworm and pour it near to my dragon

Just target feed with frozen food using a turkey baster or a syringe (like a baby-bird feeding one).