Usually fish nuggets are fish fillets that are cut into pieces then breaded and fried. Skillet fried fish nuggets.
If so, the answer is no. Nothing that has been cooked (other than boiled in water and nothing else) or prepped or seasoned or oiled or salted or peppered or fried, etc. etc. can be fed to a fish IMHO. Their food is best to be as natural (as close to their natural foods) as possible, or course, barring potential transfer of harmful parasites and bacteria. Properly manufactured dry foods for fish (the right kind of fish) are fine too.
What's the list of ingredients and the cooking procedure?
Wikipedia: Iridescent shark (aka Pangasianodon hypophthalmus) is sold as swai (pronounced /swaɪ/) in the United States. It has a milder flavor and more delicate texture than the U.S.'s native channel catfish. Swai have moist, sweet, mild flavored flesh with a beige color which turns white after cooking. In the U.S. it is often sold as frozen skin-off fillets weighing from 2 oz to 11 oz each. Typical grading sizes are: 3-5 oz, 5-7 oz, and 7-9 oz.