Both adipose and an nal fins were derived from skin,the epidermis of adipose and anal fins were basically the same as theepidermis of teleostean skin,and the developed collagen fiber stratum was equivalent to the stratum subcutaneum of ski.

The undulatory dorsal/median fin propulsion modes as represented by amiiform and balistiform fish are of great significance for bionic propulsion research, particularly for the design and control of underwater vehicles, which are generally employed at slow speeds, offering greater maneuverability and better propulsive efficiency.