It is possible that the Symmorium is actually the female version of the Stethacanthus, and therefore they mate with each other.
Scientists are not completely sure of this, but it sounds very probable.
In addition to this intriguing factor, the Stethacanthus shark possessed an exceedingly fascinating dorsal fin.
This fin was in the same position as the dorsal fin of a modern day shark, however the top of it was flat and enamored in large scales.
The appearance of this headgear is often compared to a brush.
Even though we are unsure what these dorsal fins were used for, there are a few theories.
One belief is that this headgear resembled jaws of a massive being, and therefore deterred any predators.
Another theory is that this headgear was used to attract females when mating.
Nevertheless, the Stethacanthus shark was without a doubt an intriguing specimen.