Diamond sturgeon (Acipenser gueldenstaedtii), also known as the Russian sturgeon or Danube sturgeon is one of the larger sturgeon species. They can become very tame and reach large sizes! This needs to be considered before purchasing. All Sturgeons require good water quality and high oxygen. They also require year round feeding of good quality sinking pellets (not trout or coarse pellets!). When looking for a Diamond Sturgeon you should look to obtain the lightest possible. Poorer quality ones loose their white markings as they grow.