FYI, the picture used is a stock image. There's no point in having a debate about whether it's a scar or not when it's not even the result of the treatment, which was in a mouse by the way.

I would recommend reading the article, but the cliff notes version is that the experiment is using e.coli bacteria to produce the protein from the mussels, as extracting it from the source is time consuming, and in small amounts.

Then it's purified, mixed with hyaluronic acid and combined with epidermal growth factor, and allantoin to help speed healing, both of which are released over time into the wound, though at markedly different rates. One of the biggest advantages of it though, is it's bio-compatibility and a safe degradation, as opposed to something like sutures,which themselves cause scars, or fibrin glue which can cause clots if it seeps into the blood.