As soon as I had seen the misleading title about "metal jaws", I was going to make the same comment.
Unfortunately, this kind of stupid title about "metal" body parts appears periodically in popular science publications, whenever the topic is about animals which use skeleton reinforcing minerals that happen to use manganese, iron, copper or zinc ions, instead of the (more commonly encountered in skeleton minerals) ions of calcium, silicon, strontium or barium.
There are a few bacteria which are able to reduce some metallic ions to the corresponding metal (e.g. silver ions to metallic silver), with the purpose of precipitating the metal ions from the water and thus avoiding the toxic effect of those metallic ions.
However, there are no known living beings, except humans, which are able to build useful structures using metals.
Paper link: https://www.cell.com/matter/fulltext/S2590-2385%2822%2900153...
PDF link: https://www.cell.com/action/showPdf?pii=S2590-2385%2822%2900...
"Extended PDF" link: https://www.cell.com/matter/pdfExtended/S2590-2385(22)00153-... (which appears to be the regular PDF plus 13 pages of supplementary information but for some reason is 5 times as large)