I have a mandarin marine water fish that i need to feed?

i would appreciate suggestions on foods or where items can be obtained
Answers:
Most wont eat prepared foods, only live pods. Head on over to reefcentral.com and look em up. Also unless you have about 100 pounds of live rock and he is about the only pod eater you have it will probably very slowly starve. Take it back to the store for an exchange.

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Mandarins tend to be rather picky eaters, preferring to feed from the
bottom. Due to the relatively small size of their mouth they must be
fed only small food items or finely chopped foods. As mentioned above
they appear to do much better in aquariums with abundant live rock
and/or plants. This may be due to the fact that there is an abundance
of natural food items for them to feed on. In such an aquarium they
will spend most of the day grazing amongst the substrate searching
for food items such as small crustaceans (e.g. Mysids, amphipods,
isopods and benthic copepods), small worms and protozoans. If you
have a well stocked reef tank you will probably never have to give
any additional feedings to your Mandarins. If you do decide to try
additional feedings you can try baby brine shrimp, frozen/live Mysis
shrimp or adult brine shrimp. In some cases it may help to turn off
you water pumps and filters such that the food can settle to the
bottom first so that the fish can get to them. If your Mandarins are
housed with larger, more aggressive fish, they will not get to the
food in time. In any event, keep in mind that Mandarins are not big
eaters so any additional feedings should consist of small quantities
of finely chopped foods.