Can you guess what kind of fish I caught in a pond with Sturgeon???

Commercial Fishery near Warsaw, a pond with Sturgeons. Guess what kind of fish I caught there! They were ferocious fish and it was not easy to pull them to the shore. Fish were escaping for a dozen or more meters into the depths of the pond. Write in the comments what fish you bet on! Index 0:00 - 0:04 - Introduction 0:05 - 2:45 - Sturgeon pond, first mystery fish 2:46 - 4:31 - Second mystery fish 4:32 - 4:51 - Third mystery fish 4:52 - 6:16 - Pond with Tench fish, fourth mystery fish