After merging with the various eldritch horror leftovers, The Sea Demon Octopus was able to recreate his serpents to the point where there were guns and cannon barrels popping out of their bodies. Meanwhile, there were a few newly generated 'tentacles' that literally took the shape of the miniguns and cannon barrels.
But unlike the standard guns and cannons, the Sea Demon Octopus shoots out bolts and projectiles which are void magic based and thus still effective against the Greater Fishmen. However, the enemies were not going down as quickly as the refined Anti Celestial compounds that Ayse and the factories had been pumping.
And although this enabled the Sea Demon Octopus to fire at the Greater Warrior Fishmen, the enemies were also more intelligent, All of them were not serious in fighting against the serpents as they noticed that the bulk of magic was stemming from somewhere.