A nascent technology, scientists are now working on creating a bio-degradable version of this nanometer long fish.

Since decades doctors have dreamt of delivering drugs to specific parts of your body. That dream has now become a reality thanks to fish.

Researchers from UC San Diego have developed a 800 nanometers long metallic fish that can swim into the deeper reaches of your bloodstream and while targeting one particular part of your body.

This fish has a gold head and tailfin, while silver hinges brings together its nicked body. In order to get them to swim, researchers have created an oscillating magnetic field. Since they are passive, they aren’t equipped with propellers, their swim rate is slow.

The technology is nascent and has its flaws, i.e., the materials that it is made up of isn’t bio-degradable. Thus, unless researchers find a way to flush it out, it would remain stuck in your body. Furthermore, gold and silver aren’t exactly cheap. But nevertheless, this is a significant development.

Scientists are now working on making it bio-degradable and are hopeful that its utility will be more than just a delivery system for drugs. It can, for instance, be used for certain kinds of non-invasive surgeries.

Right now, it is just a matter of refining the technique before scientists come up with a better working model.

Take a look at this video for more details.