The Spider Mutants (クモ怪人 Kumo Kaijin) (1 & Movie 2) are five spider monsters. They can spew webbing from their mouths.
The Spider Mutants were responsible for killing Soichiro Akizuki. 4 of them were killed by Kamen Rider Black's Rider Punches and the other one was killed by the Rider Kick.
A Spider Mutant appeared as one of the Phantom Mutants that are summoned by Fly Mutant through Yuki. It disappeared when Mokoto used his psychic powers to expel Fly Mutant from Yuki.Tokyo - Big Monster Gathering
Video game appearances
Kamen Rider Black: Taiketsu Shadow Moon
The Spider Mutant is the first mutant opponent fought by Kamen Rider Black in the video game Kamen Rider Black: Taiketsu Shadow Moon.