Ves was disappointed that he could not make widespread use of blinking organs.
Unless he dispatched his troops to slaughter the nearby Swarmer hordes en masse, it was hard to gather more than a couple of dozen blinking organs that the expeditionary forces had already gathered up until this point.
Although Ves was tempted to order his troops to launch an all-out hunt on the assassin fish, the chances were too great that slaughtering hundreds of thousands of Swarmer fish-whales might alarm the guiding intelligence of the Swarm Kingdom!
After the exobiologists had studied the fish-whales in many different ways, they developed numerous theories and insights regarding the most formidable and most numerous threat in Purgatory.
Since there were millions of Swarmers, the loss of thousands or tens of thousands of fish-whales didn't change the overall situation. There was no reason to pay attention to the deaths or disappearance of a few hordes.