Isoginjaguar (イソギンジャガー, Isoginjagā; 84) - A sea anemone/jaguar monster originally known as Katsurajou Yosuke who was turned into Gel-Shocker kaijin by General Black. He was able to swim, bite through rocks, emit poison from his back called Poisonous Water from his back that could melt human flesh, use the tentacles on his neck and mouth to strangle opponents, and teleport. After being defeated by Kamen Rider 1's Rider Point Kick and saw Katsurajou Maki calling him, he jumps then reverts to human form and still remembers his beloved daughter.