DNA results on caviar supplied by Kings Fine Foods have found no evidence of mislabelling.
Tests carried out on Oscietra, Baerlie and Naccarii caviars have all proved positive following sample tests initiated by Kings Fine Foods following recent "inferior fish" investigations.
The tins in question, marked sevruga, were found by the Environmental Health Association (EHA) to contain roe from a cheaper breed.
King told Caterer and Hotelkeeper: "Some random batches of caviar were tested by the EHA and one came back as not being sevruga but ruthenus caviar. I had never seen or dealt with it before.
"With beluga and oscietra it is very easy to tell, but with the much smaller egg of sevruga it's more difficult, because the taste profile of farmed caviar is very different to when wild caviar was available. It's far less pronounced.
The company's Beluga stocks are also being tested and results are expected next week.
Kings Fine Foods will now run a programme of DNA testing every six months unless a large batch of caviar is purchased. King believes they are the first Caviar company in the World to be carrying out such an extensive DNA testing processes.