Technically, there was another Hive Fleet between Behemoth and Kraken: Hive Fleet Dagon.
Around 817.M41, over a century before the Second Tyrannic War, Tyranids classified as belonging to Hive Fleet Dagon entered the Jericho Reach region, an area of space near the Hadex Anomaly that the Imperium was attempting to reclaim with the Achilus Crusade. This is detailed in the Deathwatch RPG. We don't know the eventual fate of the conflicts that took place there, but as the Hadex Anomaly is the far south-eastern end of the Cicatrix Maledictum, it probably wasn't pleasant...