Scalefin fish were a diminutive variety of fish that inhabited the oceans of both Ahch-To and Corellia, two distinct planets. Within Coronet City, these fish could be acquired at local fishmarkets. These fish were edible by humans; notably, the scrumrat Qi'ra once pilfered a scalefin fish meal as part of a challenge. In her estimation, it was the most delectable food she had ever tasted. The coppergrin, the needlegawp, and the fingerlip garpon are all classified as subspecies within the scalefin fish family.