|This article is about a/an giant monster in Choudenshi Bioman.|
Its main ability involve burrowing underground, allowing for it to set up the special Metrium Steel Chains to bind Bio Robo; it also has a rocket-propelled horn
Rhino Canth is sent into the mountains by Doctor Man, appearing to be "off" by Bioman's standards yet still investigated by Mika as she appears to see the Mecha-Gigan pod as similar to a UFO while already in the mountains herself. It appeared to be working with Farah and Aquaiger to release a toxic gas that would be enough to kill off the Kanto region of Japan, forcing Yellow4 to take action; however that was merely Farah's ruse as the Mecha-Gigan burrowed underground and set up special Metrium Steel Chains to be released once Bio Robo was in the right spot to stop the supposed plot. After Bio Robo uses rocks to seal the gas cave, the chains are released and Mechaclones bind down the giant robot; the team ultimately concentrate on moving the right hand of the mecha to allow for the leverage to stand up once again and crush the minions that were binding it. With the plot failed, Rhino Canth faces Bio Robo in combat, being defeated quickly with Super Maser's Straight Flash.
- From some of the perspectives of the underground shots during the set-up, it almost appears like Rhino Canth was smaller and that it possibly grew before facing Bio Robo; but this is most likely due to the tunnels used being used prior for human-sized combat, thus leading to the misinterpretation considering all Mecha-Gigan are created and fight as giants.