Coelacanth Mutant (24) - A coelacanth monster used by Gorgom to capture female college students and use them through surgery involving "Coelacanth DNA Injection" to create female Gorgom warriors for their own desire. It can shoot electricity from its fingers, emit laser balls from its hands, and turn into an electrical ball. Professor Takayama became the Coelacanth Mutant through Gorgom, but took medicine to keep him from changing into it. When Katsumi becomes the next target, Kotaro was attacked by Katsumi until he brought the Coelacanth Mutant out and escaped during the first battle with Katsumi in its clutches. With the help of some children (whom were really adults turned into children by de-aging medicine), Kotaro found the captive female college students just as Professor Takayama became the Coelacanth Mutant which surprised Katsumi. The children got the captives out (while losing the life of one of them) so Kotaro can become Kamen Rider Black. Once Kamen Rider Black destroyed the Coelacanth Mutant with the Rider Kick, the explosion destroyed Takayama Research Lab.