To be honest, I’ve never seen a Sharkos up close and don’t know much about it, so here is what the catalog says:

Silently, but swiftly, your Micronaut Fantasy Figure is transported through the murky water. Sharkos, the silent predator from the undersea world of Isaurus propels a Micronaut to his amphibious destinatin. Sharkos accepts all interchaneable Micronaut figures and accessories. One AA battery required.

Classic toys and ephemera from the 70s